
Product Description
The Seiko SRPD51K1 is a durable automatic diver powered by the reliable 4R36 movement. Its Hardlex crystal, stainless-steel case, and unidirectional bezel deliver functionality and rugged everyday performance.
| Case & Exterior | |
|---|---|
| SKU | SRPD51K1 |
| Case Material | Stainless steel |
| Case Size | Thickness 13.4mm · Diameter 42.5mm · Lug-to-lug 46.0mm |
| Crystal | Hardlex |
| LumiBrite | On hands and index(es) |
| Clasp | Three-fold clasp with secure lock · Push button release |
| Distance Between Lugs | 22mm |
| Water Resistance | 10 bar |
| Magnetic Resistance | 4,800 A/m |
| Weight | 170.0g |
| Features | Unidirectional rotating bezel · See-through & screw case back |
| Movement & Specifications | |
|---|---|
| Caliber Number | 4R36 |
| Movement Type | Automatic with manual winding |
| Power Reserve | Approx. 41 hours |
| Jewels | 24 |
| Functions | Stop second hand function · Day/Date display |
| Vibration Rate | 21,600 vibrations per hour |
| Calendar | Day/Date |
| Durability Notes | Reliable everyday diver movement |
| Service Interval | Recommended every 3–5 years |
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