| Reference Ocarat | #100439 |
| Reference | SRPJ81K1 |
| Brand | Seiko 5 Sports |
| Product Type | Watch |
| Gender | Men Women |
| Color | Black Gray |
| Material | Steel |
| Material Quality | Stainless Steel |
| Warranty | 3 years |
| Diameter (in mm) | 36,00 |
| Manufacturing | Asia |
| Labels and Certificates | Authorized Retailer |
| Case Shape | Round |
| Watch Case Back | Exhibition Case Back Screwed caseback |
| Crystal Shape | Domed |
| Glass Quality | Hardlex |
| Watch Case Types | Date Day |
| Buttons | 1 Crown |
| Water Resistance (in ATM) | 10 |
| Frequency | 21,600 A/h (3 Hz) |
| Movements | Automatic (rotor) |
| Movement Type | Japanese Movement |
| Movement Brand | Seiko Corp. |
| Calibers (Movements) | Seiko 4R36 |
| Power Reserve (Maximum Duration) | 41 Hours |
| Display Type | Analog (hands) |
| Display Specifications | Arabic Numerals Indices and railroad track Lumibrite Hands Lumibrite Indices |
| Bracelet Material | Stainless Steel |
| Strap Color | Gray |
| Watch Clasp | Deployant buckle with safety clasp |
| Lug Width (in mm) | 18,00 |
Seiko has been honing its watchmaking expertise since its founding, building a legacy of robust, precise timepieces that speak to the brand's relentless pursuit of performance and innovation. Today, the brand presents this distinctively designed model referenced SRPJ81K1 from its Sport Style collection. It features a round case crafted in stainless steel, measuring 36 mm in diameter and 12.52 mm thick. Finished in a striking grey tone, it adds a bold accent to your wrist. The case is fitted with a domed Hardlex crystal protecting the dial. On the right side, a silver-toned screw-down crown handles the adjustment of the central indicators. Finally, its transparent screw-down case back lets you admire the movement while ensuring water resistance of 10 ATM.
This watch showcases a beautifully round dial in black, which pairs perfectly with the watch's grey tone. Clean and understated, it effortlessly complements any style. Two sword hands in silver point to hours and minutes, indicated by indexes and Arabic numerals from 1 to 12 alongside military numerals from 13 to 24. The slender seconds hand with a red tip marks the seconds. For added convenience, all time indicators feature a Lumibrite treatment for clear readability even in dark environments. A dual window at 3 o'clock displays both the date and the day, while a minute railroad track runs along the dial's edge. Seiko signs its name at 12 o'clock, adding a sophisticated, refined touch.
This watch is powered by an automatic movement manufactured in-house by the brand - specifically the caliber 4R36, featuring 24 jewels and beating at 21,600 vibrations/hour. Renowned for its robustness, it reliably drives the hour, minute, and seconds hands as well as the day-date window. The power reserve stands at 41 hours.
Completing the beautifully retro character of this watch, the brand equips it with a stainless steel link bracelet with a chic, elegant design. It pairs beautifully with city looks and fastens effortlessly with a single deployment clasp with safety lock and push-buttons. The lug width measures 18 mm.
With water resistance to 100 meters - or 10 ATM in watchmaking terms - this bold timepiece is equally at home at a gala or in the water. Take it along for a shower, a bath, or a swim (even an intense one!). That said, our expert team wants to be clear: this model is not designed for scuba diving, freediving, or use with high-pressure washers. Remember: showers, baths, and swimming only - and keep the crown out of the water!


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Sports Style Watch SRPJ81K1
(Ref. 100439)