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Experience precision engineering with the Seiko Prospex SPEEDTIMER HBC004J1, a mechanical timepiece designed for those who demand functionality and reliability. Featuring the robust 6R55 automatic movement with manual winding, this watch delivers exceptional accuracy and a 72-hour power reserve. The 39.5mm stainless steel case with super hard coating offers durability for daily wear, while the curved sapphire crystal and 200m water resistance ensure protection in various conditions. The countdown timer functionality, powered by an inner rotating ring, makes this model ideal for timing activities with precision. LumiBrite hands and indexes provide visibility in low-light environments. Crafted with a cow leather band and secured by a three-fold clasp with push button release, this SPEEDTIMER combines sport-ready features with classic watchmaking heritage. The screw case back and stop second hand function add to its practical appeal for timing enthusiasts and watch collectors alike.
| Caliber Number | 6R55 |
| Movement Type | Automatic with manual winding |
| Accuracy | +25 to -15 seconds per day |
| Power Reserve | Approx. 72 hours(3 days) |
| Case Material | Stainless steel (super hard coating) |
| Case Diameter | 39.5mm |
| Case Thickness | 12.0mm |
| Lug-to-Lug | 44.5mm |
| Crystal | Curved sapphire crystal |
| LumiBrite | On hands and indexes |
| Water Resistance | 200m |
| Clasp Type | Three-fold clasp with push button release |
| Functions | Stop second hand function |
| Features | Inner rotating ring with countdown scale, Screw case back |
| Band Material |
Cow leather |
