{"product_id":"seikoセイコー-64s-seiko-matic-weekdater-cal-400","title":"SEIKO: 64's \/ Seiko Matic Weekdater \/ Cal. 400","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: 99.5798%; 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: 6.30252%; 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: 93.2773%; height: 39.1875px;\" bgcolor=\"#FFFEFC\"\u003e\n\n\u003cp\u003e1964\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: 6.30252%; 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: 93.2773%; height: 58.7812px;\" bgcolor=\"#FFFEFC\"\u003e\n\n\u003cspan lang=\"EN-US\"\u003eCal. 400 \/ 33 Jewels \/ Automatic\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: 6.30252%; 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: 93.2773%; height: 58.7812px;\" bgcolor=\"#FFFEFC\"\u003e\n\n\u003cspan\u003eLength 43.1\u003c\/span\u003e\u003cspan\u003emm (including lugs) \/ Width 36.9mm\u003c\/span\u003e\u003cspan\u003e (including crown) \/ Thickness 11.4mm\u003c\/span\u003e\u003cspan\u003e \/ Lug width 19mm \/ Weight 53\u003c\/span\u003e\u003cspan\u003eg (including band)\u003c\/span\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: 6.30252%; 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: 93.2773%; height: 58.7812px; text-align: left;\" bgcolor=\"#FFFEFC\"\u003e Case: SGP (Gold Plated)\u003cbr\u003e\u003cspan\u003eCase back: SS (Stainless Steel) \u003c\/span\u003e\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\n\u003cth style=\"width: 6.30252%; 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: 93.2773%; height: 39.1875px;\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003eWatch \/ RESUME original case \/ Our 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: 6.30252%; 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: 93.2773%; height: 19.5938px;\" bgcolor=\"#FFFEFC\"\u003e\u003cspan style=\"color: #0f000d; font-size: small;\" size=\"2\" color=\"#0F000D\"\u003e Antique (Used) \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: 6.30252%; 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: 93.2773%; 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: 6.30252%; height: 215.531px;\" align=\"center\"\u003eNote\u003c\/td\u003e\n\n\u003ctd style=\"width: 93.2773%; height: 215.531px;\"\u003e*This product will be overhauled after your order, so shipping will take about 1-2 months.\u003cbr\u003eThank you for your understanding.\u003cbr\u003e\u003cbr\u003e*Please note that colors may appear slightly different on screen than in person.\u003cbr\u003e\u003cbr\u003e*This product is also sold in stores. While we update our inventory regularly, there is a possibility that the item you purchased may be out of stock. In the unlikely event that the item is out of stock, we may have to cancel your order. Thank you for your understanding.\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\u003cp data-end=\"115\" data-start=\"82\"\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-start=\"66\" data-end=\"90\"\u003eThis is a 1964 Seiko \"Seikomatic Weekdater\".\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIn the early 1960s, Japanese wristwatches evolved into more practical timepieces with the popularization of automatic winding mechanisms and calendar functions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Seikomatic Weekdater is an automatic model with day and date display that appeared during this era.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe layout, with the date at 3 o'clock and the day of the week at 6 o'clock, is different from the common day-date displays of today, and reflects the unique character of Japanese watches of that time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAmong them, this model equipped with Cal. 400 is a higher-end version of the Seikomatic Weekdater.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eIt is a tasteful model that allows one to feel the process by which Japanese automatic watches achieved their perfection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"221\" data-end=\"337\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"layout-grid-mode: char; mso-layout-grid-align: none;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e■Dial and Case Design\u003c\/strong\u003e\u003cspan lang=\"EN-US\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe dial is a silver dial with a sunray finish.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eLight creates subtle variations in shading, giving a sense of understated depth to the clean dial.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe combination of three-dimensional applied bar indices and slim dolphin hands creates a simple yet highly legible design, characteristic of Seiko's refined aesthetic in the 1960s.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe date display is at 3 o'clock and the day of the week display is at 6 o'clock.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eUnlike typical day-date displays arranged in a single horizontal line, the layout with the functions separated at the top and bottom of the dial is a unique feature of the Seikomatic Weekdater.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \"AD\" mark can be seen at the bottom of the dial.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThis mark is generally understood to indicate specifications for external components such as applied indices, and is one of the subtle details characteristic of Seiko at the time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe case is a round case with gold plating.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe design, which integrates the crown into the case, ensures a balanced left-right symmetry when viewed from the front, resulting in a clean and symmetrical design.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDespite its glamorous gold color, the slim bezel and elegantly extending lugs give the overall impression a subdued finish.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003e■Movement\u003cbr\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0762\/8980\/2535\/files\/2026-06-09T204351.237.png?v=1781006117\"\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe movement is the automatic Cal. 400.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe Cal. 400 was a movement adopted in the early Seikomatic Weekdater models, and it is a higher-end caliber with 33 jewels.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eIn addition to the date display, it features a day of the week display at 6 o'clock, making it a highly practical configuration for a Japanese automatic watch in the early 1960s.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAnother highlight of this movement is its gold finish.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eAlthough it is usually hidden by the case back, it shows how Seiko at the time put high-end craftsmanship into its practical models.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis movement has a distinct early Seikomatic feel, different from later Seiko automatic movements.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1156\" data-end=\"1241\"\u003e \u003c\/p\u003e\n\u003cp style=\"layout-grid-mode: char; mso-layout-grid-align: none;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e■Styling\u003cbr\u003e\u003c\/strong\u003e\u003cspan lang=\"EN-US\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1247\" data-start=\"1203\"\u003e\u003cspan\u003eCase size: 43.1mm long (including lugs) \/ 36.9mm wide (including crown) \/ 11.4mm thick \/ 53g weight (including strap)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe combination of a silver dial and gold-plated case adds a touch of elegance to your wrist.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eWhen paired with a white shirt or a light blue shirt, the gold color is not too strong, creating a calm and classic impression.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFor jacket styles, it pairs well with colors such as navy, brown, and charcoal gray, and has a natural presence when seen peeking out from the cuff.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor a casual look, we recommend pairing it with an unbleached knit, a beige cardigan, or dark denim.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe gold color of the watch won't stand out too much in your outfit, adding a soft, vintage-like touch.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt's a versatile piece that can be easily incorporated into everyday wear and is also suitable for formal occasions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1626\" data-start=\"1583\"\u003e\u003cbr\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\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eRegarding the condition, the engraving on the back cover is faded.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eAlso, some of the plating on the lugs is peeled off, but this is not a noticeable area when worn, and it is in a condition that can be used naturally as a vintage watch.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe dial, hands, and indices do not show any significant damage that would detract from the impression, and the movement does not show any particular defects at present.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1786\" data-end=\"1829\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cspan lang=\"EN-US\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan lang=\"EN-US\"\u003e\u003cstrong\u003e■To ensure your peace of mind when purchasing\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cspan\u003eAll watches handled by our store are inspected internally by a professional watch repair technician upon arrival and are sold only after being confirmed as genuine, so you can purchase with confidence.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eWhen you purchase a watch, we will attach a new leather strap from our store.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePlease select your desired color from the order selection tab and place your order.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e*For watches with genuine straps or metal bands, the leather strap will not be attached but sent separately as a spare.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eWe will also send a special watch case 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●Important information after purchasing an antique watch. Please be sure to read the contents.●\u003cbr\u003e\u003cbr\u003eAt RESUME, when selling antique watches, we do not deliver the watch immediately after receiving your order, but rather\u003cbr\u003ewe commission a professional craftsman to perform an overhaul (hereinafter referred to as OH), and deliver the watch after the OH is completed. (The period is approximately 1 to 2 months)\u003cbr\u003e\u003cbr\u003eA professional craftsman with a Class 1 watch repair technician qualification will completely disassemble the watch, replace consumable parts such as internal gaskets, clean, and lubricate it.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000; font-size: xx-small;\" size=\"1\" color=\"#ff0000\"\u003eThe watch will be thoroughly overhauled and serviced to an accuracy of approximately ±1 minute per day.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000; font-size: xx-small;\" size=\"1\" color=\"#ff0000\"\u003eWhen delivered, we will also send our original OH certificate, which details the work performed during the OH, along with photos of the movement disassembly and maintenance.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000; font-size: xx-small;\" size=\"1\" color=\"#ff0000\"\u003eOf course, due to the nature of the product being used, there is no guarantee that it will never break, but we take this approach so that you can enjoy the original performance of the watch and use it with peace of mind in the future. We appreciate your understanding.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000; font-size: xx-small;\" size=\"1\" color=\"#ff0000\"\u003eWhen purchasing a product, a 1-year warranty period is provided depending on the model. Even for products whose warranty period has expired, we offer repair services, although they are subject to a fee. If you do not have a repair shop nearby, please feel free to consult us.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"RESUME","offers":[{"title":"black","offer_id":51473625547047,"sku":null,"price":115500.0,"currency_code":"JPY","in_stock":true},{"title":"Brown","offer_id":51473625579815,"sku":null,"price":115500.0,"currency_code":"JPY","in_stock":true},{"title":"Navy","offer_id":51473625612583,"sku":null,"price":115500.0,"currency_code":"JPY","in_stock":true},{"title":"wine","offer_id":51473625645351,"sku":null,"price":115500.0,"currency_code":"JPY","in_stock":true},{"title":"Chestnut","offer_id":51473625678119,"sku":null,"price":115500.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/8980\/2535\/files\/2026-06-09T204701.342.png?v=1781006105","url":"https:\/\/vintage-watch-resume.com\/en\/products\/seiko%e3%82%bb%e3%82%a4%e3%82%b3%e3%83%bc-64s-seiko-matic-weekdater-cal-400","provider":"RESUME","version":"1.0","type":"link"}