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16550 vs 16570
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| Specification | ||
|---|---|---|
| Production | 1985–1989 | 1989–2011 |
| Era | Sapphire transition | 40mm modern |
| Status | discontinued | discontinued |
| Case diameter | 40mm | 40mm |
| Lug width | 20mm | 20mm |
| Case material | Stainless steel | Stainless steel |
| Bezel | Fixed 24-hour, engraved steel | Fixed 24-hour, engraved steel |
| Bezel material | Stainless steel | Stainless steel |
| Crystal | Sapphire | Sapphire |
| Crown | Twinlock screw-down | Twinlock screw-down |
| Caseback type | Solid screw-down steel | Solid screw-down steel |
| Water resistance | 100m | 100m |
| Dial | White (Polar) or black | White (Polar) or black |
| Dial configuration | 3-6-9 with white-gold-surround markers; independent orange 24h hand | 3-6-9 with white-gold-surround markers; independent orange 24h hand |
| Hands | Mercedes + independent orange 24h | Mercedes + independent orange 24h |
| Lume | Tritium | Tritium then LumiNova / Super-LumiNova |
| Lume type | Tritium | Tritium / LumiNova |
| Movement | Automatic | Automatic |
| Caliber | 3085 | 3185 / 3186 |
| Manufacturer | Rolex | Rolex |
| Winding | automatic | automatic |
| Power reserve | ~48 hours | ~50 hours |
| Frequency | 28,800 vph | 28,800 vph |
| Jewels | 27 | 31 |
| Functions | Hours, minutes, seconds, date, independent 24h | Hours, minutes, seconds, date, independent 24h |
| Bracelet | Oyster | Oyster |
| Bracelet material | Stainless steel | Stainless steel |
| Bracelet reference | 78360 | 78790A |
| End links | 580 | 501B (hollow, later solid) |
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