{"product_id":"eternaエテルナ-50s-eterna-matic-birks-エテルナマチック-バークス","title":"ETERNA 50's \/ ETERNA-MATIC × BIRKS","description":"\u003ctable width=\"100%\" border=\"1\" style=\"width: 100%; height: 548.625px;\"\u003e\n\n\u003ctbody\u003e\n\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\n\u003cth style=\"width: 99.6455%; height: 19.5938px;\" colspan=\"2\" align=\"center\" bgcolor=\"#FFFEFC\"\u003e\u003cb\u003e\u003cspan style=\"color: #0f000d;\" color=\"#0F000D\"\u003eProduct Details\u003c\/span\u003e\u003c\/b\u003e\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\n\u003cth style=\"width: 6.26139%; height: 39.1875px;\" align=\"center\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003eYear of Manufacture\u003c\/span\u003e\u003c\/th\u003e\n\n\u003ctd style=\"width: 93.3841%; height: 39.1875px;\" bgcolor=\"#FFFEFC\"\u003e\n\n\u003cp\u003e1950s\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\n\u003cth style=\"width: 6.26139%; height: 58.7812px;\" align=\"center\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003eMovement\u003c\/span\u003e\u003c\/th\u003e\n\n\u003ctd style=\"width: 93.3841%; height: 58.7812px;\" bgcolor=\"#FFFEFC\"\u003e\n\n\u003cspan lang=\"EN-US\"\u003eAutomatic\u003c\/span\u003e\u003cbr\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\n\u003cth style=\"width: 6.26139%; height: 58.7812px;\" align=\"center\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003eCase Size\u003c\/span\u003e\u003c\/th\u003e\n\n\u003ctd style=\"width: 93.3841%; height: 58.7812px;\" bgcolor=\"#FFFEFC\"\u003e\n\n\u003cp\u003e\u003cspan\u003e40.2mm (vertical, including lugs) \/ 35.7mm (horizontal, including crown) \/ 10.8mm (thickness) \/ 17mm (lug width) \/ 37g (including strap)\u003c\/span\u003e\u003c\/p\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\n\u003cth style=\"width: 6.26139%; height: 58.7812px;\" align=\"center\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003eCase Material\u003c\/span\u003e\u003c\/th\u003e\n\n\u003ctd style=\"width: 93.3841%; height: 58.7812px; text-align: left;\" bgcolor=\"#FFFEFC\"\u003e Gold-plated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\n\u003cth style=\"width: 6.26139%; height: 39.1875px;\" align=\"center\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003eAccessories\u003c\/span\u003e\u003c\/th\u003e\n\n\u003ctd style=\"width: 93.3841%; height: 39.1875px;\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003eWatch, RESUME original case, store warranty (1-year free warranty)\u003c\/span\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\n\u003cth style=\"width: 6.26139%; height: 19.5938px;\" align=\"center\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003eCondition\u003c\/span\u003e\u003c\/th\u003e\n\n\u003ctd style=\"width: 93.3841%; height: 19.5938px;\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003e Antique (pre-owned) \u003c\/span\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\n\u003cth style=\"width: 6.26139%; height: 39.1875px;\" align=\"center\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003eWater Resistance\u003c\/span\u003e\u003c\/th\u003e\n\n\u003ctd style=\"width: 93.3841%; height: 39.1875px;\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003e Non-water resistant \u003c\/span\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr style=\"height: 215.531px;\"\u003e\n\n\u003ctd style=\"width: 6.26139%; height: 215.531px;\" align=\"center\"\u003eNote\u003c\/td\u003e\n\n\u003ctd style=\"width: 93.3841%; height: 215.531px;\"\u003e*Please note that this product will undergo an overhaul after your order is placed, so shipping will take approximately 1 to 2 months. We appreciate your understanding.\u003cbr\u003e\u003cbr\u003e*Please note that the color may appear slightly different on screen than in reality.\u003cbr\u003e\u003cbr\u003e*This product is also sold in our physical store. While we update our inventory regularly, items may occasionally be out of stock at the time of purchase. In the rare event that restocking is not possible, we may have to cancel your order; we appreciate your advance understanding.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eIntroducing the 1950s Eterna \"Eterna-Matic Birks\".\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\" class=\"PDq2pG_selectionAnchorContainer\"\u003eEterna is a long-established watch manufacturer founded in 1856 in Grenchen, Switzerland.\u003cbr\u003eHaving worked on in-house movement development from an early stage, they have brought various technological innovations to the history of watchmaking.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe automatic model \"Eterna-Matic,\" born in 1948, brought the company worldwide fame.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eBy adopting five ball bearings for the rotor bearing, it reduced friction during rotation and wear on parts.\u003cbr\u003eThis revolutionary structure improved both the durability and winding efficiency of the automatic mechanism, and the five ball bearings continue to be used as the Eterna brand logo today.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"layout-grid-mode: char; mso-layout-grid-align: none;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e■ Dial \u0026amp; Case Design\u003c\/strong\u003e\u003cspan lang=\"EN-US\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\" class=\"PDq2pG_selectionAnchorContainer\"\u003eA classic and elegant design combining a deep black dial with gold-colored indices and hands.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eDepending on the angle of the light, the fine particles on the surface of the dial shimmer like glitter, giving it a beautiful appearance that evokes stars scattered across the night sky.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe 12 o'clock position features the name of the prestigious Montreal, Canada jeweler \"BIRKS\".\u003cbr\u003eBelow it is a logo modeled after the five ball bearings that symbolize the Eterna-Matic.\u003cbr\u003eIt is a rare double-name model featuring the names of two companies with different histories.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eCombined with three-dimensional baton indices and sharp dauphine hands, it ensures excellent visibility.\u003cbr\u003eThe double index at 12 o'clock and the dotted minute track around the edge of the dial provide a nice accent to the simple face.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe gold-colored round case adopts slender, linear lugs.\u003cbr\u003eThe domed crystal and slim case form emphasize the neat, classic atmosphere typical of the 1950s, while the contrast between black and gold adds a calm glamour to the wrist.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cstrong\u003e■ Movement\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0762\/8980\/2535\/files\/2026-09-23T175102.536.png?v=1790154485\" alt=\"\"\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\" class=\"PDq2pG_selectionAnchorContainer\"\u003eEquipped with an automatic movement developed in-house by Eterna.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe rotor rotates in sync with the movement of your arm, automatically winding the mainspring.\u003cbr\u003eThe ball-bearing mount, symbolic of the Eterna-Matic, allows for smooth rotor rotation and excellent durability.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe large rotor covering the movement is engraved with the letters \"ETERNA-MATIC\".\u003cbr\u003eIt is a movement where you can feel the high technical capabilities Eterna has cultivated within a design that excels in practicality.\u003c\/p\u003e\n\u003cp style=\"layout-grid-mode: char; mso-layout-grid-align: none;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cbr\u003e\u003cbr\u003e■ Styling\u003cbr\u003e\u003c\/strong\u003e\u003cspan lang=\"EN-US\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCase size: 40.2mm (vertical, including lugs) \/ 35.7mm (horizontal, including crown) \/ 10.8mm (thickness) \/ 37g (including strap)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe elegant color scheme based on black and gold pairs perfectly with classic styling featuring jackets or shirts.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eWearing it with a navy or charcoal gray jacket allows the gold-colored case and indices to add a subtle touch of glamour.\u003cbr\u003eA brown leather strap can be matched to the color of your shoes or belt to create a cohesive look.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eIt is also recommended for casual wear, such as with knits, denim, or chinos.\u003cbr\u003eBy incorporating it into a simple outfit, you allow the starry, shimmering black dial and the neat, 1950s-style case design to stand out.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eIt is a piece that adds dignity to formal attire and depth unique to vintage items to everyday styling.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"layout-grid-mode: char; mso-layout-grid-align: none;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e■ Condition\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\n\u003cdiv class=\"\"\u003e\n\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-8 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden @[53.5rem]\/main:[--thread-content-max-width:48rem] relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\n\u003cdiv dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\n\u003cdiv class=\"LR5Y_W_content markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\n\u003cp dir=\"auto\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThere are no noticeable scratches or damage on the dial, and it remains in good condition considering its age.\u003cbr\u003eThe fine shimmer of the black dial is beautiful, and there are no issues with visibility.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp dir=\"auto\"\u003eThe case has some partial peeling of the plating, and there are some dings on the case back.\u003cbr\u003eHowever, none of these interfere with usage, and they do not significantly detract from the vintage atmosphere the watch possesses.\u003c\/p\u003e\n\n\u003cp dir=\"auto\"\u003eThe movement is still running smoothly and is in excellent functional condition.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/section\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cp dir=\"auto\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan lang=\"EN-US\"\u003e\u003cstrong\u003e■ For Your Peace of Mind\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cspan\u003eAll watches we carry undergo internal inspection by a professional watch technician upon arrival, and are sold only after being verified as authentic, so you can purchase with confidence.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eWe will provide a brand new leather strap with your watch purchase.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePlease select your preferred color from the order tabs.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e*For products that come with a genuine watch strap or metal band, the leather strap will not be attached but sent separately as a spare.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA dedicated watch case will also be included with your shipment.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"layout-grid-mode: char; mso-layout-grid-align: none;\" class=\"MsoNormal\"\u003e\u003cspan lang=\"EN-US\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000; font-size: xx-small;\" size=\"1\" color=\"#ff0000\"\u003e● Please be sure to read this information regarding your antique watch purchase ●\u003cbr\u003e\u003cbr\u003eAt RESUME, we do not hand over antique watches immediately upon order. Instead, we request a professional craftsman to perform an overhaul (hereinafter \"OH\"), and we ship the item after the OH is complete. (Period: approximately 1–2 months)\u003cbr\u003e\u003cbr\u003eA certified first-class watch repair technician will completely disassemble the watch, replace consumable parts such as internal gaskets, clean and oil the mechanism, and perform a thorough overhaul, adjusting the watch to a state where the daily variation is within approximately ±1 minute.\u003cbr\u003eUpon delivery, we will include our store's unique OH certificate, along with photographs taken during the disassembly and maintenance of the movement, detailing the work performed.\u003cbr\u003e\u003cbr\u003eWhile there is no guarantee that the product will never break, as it is a pre-owned item, we have implemented this process so that you can enjoy the original performance of the watch and use it with peace of mind in the future. We kindly ask for your understanding.\u003cbr\u003e\u003cbr\u003eFor purchases, we provide a 1-year warranty period depending on the model. Even after the period has expired, we provide professional repair services for a fee. Please feel free to consult us even if there is no repair shop nearby.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"RESUME","offers":[{"title":"Scotchgard: Black","offer_id":52156865872167,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"Scotchgard: Brown","offer_id":52156865904935,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"Scotchgard: Navy","offer_id":52156865937703,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"Scotchgard: Wine","offer_id":52156865970471,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"Scotchgard: Chestnut","offer_id":52156866003239,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"MIMOSA: Black","offer_id":52156866036007,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"MIMOSA: Grey","offer_id":52156866068775,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"MIMOSA: Brown","offer_id":52156866101543,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"MIMOSA: Dark Brown","offer_id":52156866134311,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"KID: Black","offer_id":52156866167079,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"KID: Khaki","offer_id":52156866199847,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"KID: Orc","offer_id":52156866232615,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"KID: Wine","offer_id":52156866265383,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true},{"title":"KID: Dark Brown","offer_id":52156866298151,"sku":null,"price":242000.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/8980\/2535\/files\/2026-09-23T175420.744.png?v=1790154468","url":"https:\/\/vintage-watch-resume.com\/en\/products\/eterna%e3%82%a8%e3%83%86%e3%83%ab%e3%83%8a-50s-eterna-matic-birks-%e3%82%a8%e3%83%86%e3%83%ab%e3%83%8a%e3%83%9e%e3%83%81%e3%83%83%e3%82%af-%e3%83%90%e3%83%bc%e3%82%af%e3%82%b9","provider":"RESUME","version":"1.0","type":"link"}