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SEIKO 63's Sportsmatic Cal.2451

SEIKO 63's Sportsmatic Cal.2451

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Introducing the Seiko "Sportmatic" made in 1963 .

Production of the "Sportmatic" began in 1963 and is the model that became the roots of the current Seiko 5 .

By revising the design of the movement and integrating the "receiving plate," which supports the parts, they have succeeded in reducing assembly time and simplifying the structure compared to previous models.
By significantly increasing production volume and reducing production costs, we can achieve excellent cost performance.

Although it is a full-fledged automatic model equipped with Seiko's unique automatic winding mechanism "Magic Lever," it has become popular due to its high cost performance, and various models have been created with changing variations.


The "Sportmatic" we are introducing this time is a highly rare watch with an impressive black dial.

The dial is a unique design, with a sunburst black dial base and line decorations radiating out from the center.
Although not noticeable from a distance, the lines stand out when light is reflected, giving the dial a three-dimensional appearance.

The upright bar indexes, dolphin hands, and pet name at the 12 o'clock position are all silver in color.
The two-tone black and silver color, combined with the unique dial, give it a dignified elegance that doesn't immediately suggest it's a sports model.

The mark at the 12 o'clock position is called the "spinning top mark" and was attached to Seiko automatic winding models at the time.

The movement is 17 jewels, automatic winding model, Cal.2451 .

By hollowing out the inside of the rotor and shifting the centre of gravity to the outside, the rotor's rotational efficiency is increased, and the Magic Lever also provides excellent winding efficiency, making this a movement with extremely stable operation.


Size: height: 43.4mm , width: 36.5mm , thickness: 10.3mm , weight: 45g .

The crown is stored inside the case, keeping the thickness down and making it comfortable to wear.
The casual look makes it easy to pair with casual styles such as denim and chinos, as well as T- shirts and sweatshirts.


The case is in good condition with no noticeable scratches.
The dial is in the same condition as it was at the time, with no signs of wear.
The movement is in good working order and there is no rust to be seen.
The crown was replaced with an original one during the initial check.


Product Details
Year of manufacture 1963 model
Movement Cal.2451 / 17 jewels / Automatic
Case Size Length 43.4 mm (including lugs) / Width 36.5 mm (including crown) / Thickness 10.3 mm / Lug width 18 mm / Weight 45 g
Case material SS (stainless steel)
accessories Watch body/Original case/Our store warranty (1 year free warranty)
situation Antique (Used)
Waterproof function Not waterproof
Note *This product will be overhauled after your order is placed, so shipping will take approximately 1 to 2 months .
Please be aware of this.

*Please note that the color of the actual product may differ slightly from what you see on your screen.

*This product is also sold in stores. We update our inventory regularly, but the product you purchased may be out of stock. Please note that if there is no stock available, your order may be cancelled.

All watches sold in our store are internally inspected by a professional watch mechanic upon arrival and are only sold after being determined to be genuine, so you can use them with confidence.

When you purchase a watch, we will attach a new leather strap to it when you deliver it to you.
Please select the color you want from the order selection tab and place your order.
*For products that come with original watch straps or metal bands, the leather strap will not be attached and will be sent separately as a spare.
A special case for the watch will also be included with the shipment.

Please be sure to read the following information after purchasing an antique watch.

When selling antique watches at RESUME, we do not immediately hand over the watch to you upon receiving your order. Instead, we ask a professional craftsman to overhaul it (hereinafter referred to as OH) and deliver it to you after the OH is completed. (This takes about 1 to 2 months.)

A professional craftsman with first-class watch repair technician qualifications will completely disassemble your watch, replace worn parts such as the internal gaskets, clean it, oil it, and perform a thorough overhaul, maintaining it to a daily accuracy of about ±1 minute.

When we deliver the machine, we will also send you our own overhaul certificate, which shows what kind of overhaul we performed, as well as photos of the machine being disassembled and maintained.

Of course, due to the nature of the product itself being a second-hand item, there is no guarantee that it will never break, but we ask for your understanding that 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.

When you purchase a product, we offer a one-year warranty depending on the model. Even if the warranty period has expired, we will properly repair the product, but there will be a fee. If there is no repair shop near you, please feel free to contact us.

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