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SRP777 vs 6306-7001
Differences are highlighted. Rows where both references share a value are dimmed.
| Specification | ||
|---|---|---|
| Production | 2016–present | 1976–1982 |
| Era | Modern reissue (4R36) | JDM cushion diver |
| Status | current | discontinued |
| Case diameter | 44.3mm | 44mm |
| Thickness | 14mm | — |
| Lug width | 22mm | 22mm |
| Case material | Stainless steel | Stainless steel |
| Construction | Cushion case, crown at 4 | Cushion case, crown at 4 |
| Bezel | Unidirectional 60-minute | Unidirectional 60-minute |
| Crystal | Hardlex | Hardlex |
| Crown | Screw-down crown at 4 | Screw-down crown at 4 |
| Caseback | — | Screw-down with a tsunami (wave) medallion |
| Water resistance | 200m | 150m |
| Dial | Black | Black |
| Dial text | — | Japanese-market dial |
| Hands | — | Baton hour and minute, lollipop seconds |
| Lume | LumiBrite | Tritium |
| Lume type | LumiBrite | Tritium |
| Movement | Automatic | Automatic |
| Caliber | 4R36 | 6306A |
| Manufacturer | Seiko | Seiko (Suwa Seikosha) |
| Winding | automatic | automatic |
| Power reserve | ~41 hours | — |
| Frequency | 21,600 vph | 21,600 vph |
| Jewels | 24 | 21 |
| Complications | Day-date, hacking, hand-winding | Day-date with a Kanji/English day wheel, hacking seconds |
Compare SRP777 with another generation