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6105-8110 vs 6105-8000
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| Specification | ||
|---|---|---|
| Nickname | Captain Willard | — |
| Production | 1970–1977 | 1968–1970 |
| Era | Asymmetric cushion case | Symmetric-case 6105 |
| Status | discontinued | discontinued |
| Case diameter | 44.4mm | 42mm |
| Lug width | 19mm | 19mm |
| Case material | Stainless steel | Stainless steel |
| Construction | Asymmetric cushion case with an integrated crown guard at 4 | Symmetric case with drilled lugs, 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 | 150m | 150m |
| Dial | Black | Black |
| Hour markers | Applied and painted | — |
| Hands | Baton hour and minute, lollipop seconds | Baton hour and minute, lollipop seconds |
| Lume | Tritium | Tritium |
| Lume type | Tritium | Tritium |
| Movement | Automatic | Automatic |
| Caliber | 6105B | 6105A |
| Manufacturer | Seiko (Suwa Seikosha) | Seiko (Suwa Seikosha) |
| Winding | automatic | automatic |
| Frequency | 21,600 vph | 21,600 vph |
| Complications | Date | Date |
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