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SEIKO 65's Sportsmatic Calendar 820 Cal.7625A

SEIKO 65's Sportsmatic Calendar 820 Cal.7625A

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Introducing the Seiko "Sportsmatic Calendar 820 " made in 1965 .

The Sportsmatic Calendar 820 was released in 1963 , eight years after Daini Seikosha's Kameido Factory released the Indicator, the first domestically produced automatic model, in 1955 . Ta.

This model is equipped with the built-in movement Cal.7625A called the 76 series.
In addition to the calendar function, it incorporates Seiko's unique automatic winding mechanism, the Magic Lever.

Furthermore, the structure was revised and the cost was lower than that of the "Indicator", making it a valuable transitional model that would become the root of the "Seiko 5" that would later be inherited.


The "Sportsmatic Calendar 820 " we are introducing this time is classified as an early model because it has a "coma mark" indicating automatic winding at the 12 o'clock position and the notation 820 .

The crown is housed in the case at 16 o'clock to emphasize automatic winding, which eliminates the need for manual winding.
It features a beautiful symmetrical case form that cannot be seen on other companies' watches.

The dial has a simple configuration with a silver-colored dial, upright bar indexes, and dolphin hands.

The minute markers engraved on the outer dial ring extend the field of view to the edge of the case, making it appear larger than the 36mm case size.

This is an attractive piece that is the ultimate in simplicity and has the simplicity and robustness that is typical of Seiko.

The movement is equipped with 17 jewels, automatic winding Cal.7625A .

It uses Seiko's unique winding mechanism, the "Magic Lever" method, which winds the mainspring securely even with minimal wrist movements.

Due to its simple structure, there are few parts that break down, making it a highly durable movement.


Size: Height: 42.5mm , Width: 36.5mm , Thickness: 11.5mm , Weight: 48g .

Due to its simple design, it can be incorporated into a wide range of outfits, from formal to casual, depending on the belt.

Although the size is a bit large for a 60 's model, it is made to be light compared to its appearance, so you won't get tired even if you wear it for a long time, and the dial is designed to be easy to read thanks to its size.


As for the condition, there are some small scratches on the case, but there are no noticeable scratches.
The "whale" engraving on the case back is still intact.

There are some scratches on the dial, but there is no problem with visibility.
The movement has no noticeable rust and is in good working order, and all functions work without problems.

Product Details
Year of manufacture Made in 1965
movement Cal.7625A / 17 jewels / automatic winding
case size Length 42.5mm (including lugs) / Width 36.5mm (including crown) / Thickness 11.5mm / Lug width 18mm / Weight 47g (including belt)
case material SS (stainless steel)
accessories Watch body/original case/our store warranty (1 year free warranty)
situation Antique (used)
Waterproof function non-waterproof
Note *This product will be overhauled after you place your order, so it will take approximately 1 to 2 months to ship.
Thank you for your understanding.

*The color may look slightly different on the screen and in real life. note that.

*This product is also sold in stores. Although we update the stock quantity from time to time, there may be times when the product you have purchased is out of stock. Please note that in the unlikely event that there is no scheduled arrival, we may cancel your order.

All of the watches we carry in our store are internally inspected by a professional watch mechanic when they arrive, and are determined to be genuine before being sold, so you can use them with confidence.

When you purchase your watch, we will deliver it to you with a new leather strap.
Please select your desired color from the order selection tab and place your order.
*For products with genuine watch straps or metal bands, the leather strap will not be attached and will be sent separately as a spare.
We will also send you a special case for the watch when shipping.

●Be sure to check the information after purchasing an antique watch●

At RESUME, when selling antique watches, we do not hand them over immediately after receiving your order, but instead request an overhaul (hereinafter referred to as OH) from a professional craftsman, and then deliver the watch after the OH is completed. (Duration is approximately 1-2 months)

Our professional craftsmen, who are certified as watch repair technicians, will completely disassemble your watch, replace consumable parts such as internal gaskets, clean it, lubricate it, and maintain it to the point where it is within ±1 minute per day.

We will also send you our own OH certificate, as well as photos of the machine when it was disassembled and serviced, to show you what kind of work was done during the OH upon delivery.

Of course, since the product itself is a used item, there is no guarantee that it will never break, but we have taken this precaution so that you can enjoy the original performance of the watch and use it with confidence in the future. Thank you for your understanding.

When purchasing a product, we provide a one-year warranty period depending on the model. Even if the product is out of date, we will repair it for a fee. If you don't have a repair shop near you, please feel free to contact us.

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