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1665 vs 16660
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| Specification | ||
|---|---|---|
| Nickname | Double Red / Great White | Triple Six |
| Production | 1967–1983 | 1983–1988 |
| Era | First Sea-Dweller | Sapphire transition |
| Status | discontinued | discontinued |
| Case diameter | 40mm | 40mm |
| Case material | Stainless steel | Stainless steel |
| Bezel | Unidirectional 60-minute | Unidirectional 60-minute |
| Bezel material | Aluminium insert | Aluminium insert |
| Crystal | Acrylic (no Cyclops) | Sapphire (no Cyclops) |
| Crown | Triplock; helium escape valve | Triplock; helium escape valve |
| Caseback type | Screw-down solid, engraved | — |
| Water resistance | 610m | 1220m |
| Dial | Black | Black |
| Dial configuration | Double-red text (DRSD) early, then single-line 'Great White' | Matte then glossy with white-gold surrounds |
| Hands | Mercedes hands | Mercedes hands |
| Lume | Tritium | Tritium |
| Lume type | Tritium | Tritium |
| Movement | Automatic | Automatic |
| Caliber | 1575 | 3035 |
| Manufacturer | Rolex | Rolex |
| Winding | automatic | automatic |
| Functions | Hours, minutes, seconds, date | Hours, minutes, seconds, date |
| Aliases | DRSD | — |
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