Compare Studio
6159-7010 vs SBBN015
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| Specification | ||
|---|---|---|
| Nickname | Grandfather Tuna | Marinemaster 300 Quartz |
| Production | 1975–1978 | 2010–2016 |
| Era | First-generation professional 600m | Modern quartz Tuna |
| Status | discontinued | discontinued |
| Case diameter | 51mm including shroud | 47.7mm including shroud |
| Case material | Titanium monocoque with a stainless steel shroud | Stainless steel with a stainless shroud |
| Construction | Monocoque titanium case — accessed from the front, with no removable caseback — inside a bolted outer shroud | — |
| Bezel | Unidirectional 60-minute | Unidirectional 60-minute |
| Crystal | Hardlex | Hardlex |
| Crown | Screw-down crown at 4 | Screw-down crown at 4 |
| Water resistance | 600m, rated for saturation diving without a helium valve | 300m |
| Dial | Black | Black |
| Lume | Tritium | LumiBrite |
| Lume type | Tritium | LumiBrite |
| Movement | Automatic | Quartz |
| Caliber | 6159A | 7C46 |
| Manufacturer | Seiko (Suwa Seikosha) | Seiko |
| Winding | automatic | quartz |
| Frequency | 36,000 vph | — |
| Complications | Day-date, hacking | Date |
| Strap options | Vented polyurethane dive strap | — |
Compare 6159-7010 with another generation