
Product Description
The Seiko SRPK91K1J blends compact sizing with classic diver styling. Featuring a curved Hardlex crystal, LumiBrite hands and indexes, and the reliable 4R36 automatic movement, it offers day/date functionality and dependable everyday performance.
| SKU | SRPK91K1J |
|---|---|
| Case Material | Stainless steel |
| Case Size | Thickness: 12.5mm • Diameter: 37.4mm • Lug-to-lug: 44.7mm |
| Crystal | Curved Hardlex |
| LumiBrite | LumiBrite on hands and indexes |
| Clasp | Three-fold clasp with push button release |
| Distance Between Lugs | 18 mm |
| Water Resistance | 10 bar |
| Magnetic Resistance | 4,800 A/m |
| Weight | 125.0 g |
| Features | See-through & screw case back |
| Caliber Number | 4R36 |
|---|---|
| Movement Type | Automatic with manual winding |
| Power Reserve | Approx. 41 hours |
| Jewels | 24 jewels |
| Beat Rate | 21,600 vibrations per hour (6 beats per second) |
| Accuracy | +45 to -35 seconds per day (factory rating) |
| Winding | Bidirectional manual & automatic winding |
| Display Functions | Day display • Date display |
| Stop Second Function | Yes — hacking seconds |
| Additional Features | Durable everyday-use movement |
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