Compare Studio
6542 vs 16750
Differences are highlighted. Rows where both references share a value are dimmed.
| Specification | ||
|---|---|---|
| Production | 1954–1959 | 1981–1988 |
| Era | First GMT-Master | Quickset transition |
| Status | discontinued | discontinued |
| Case diameter | 38mm | 40mm |
| Case material | Stainless steel | Stainless steel |
| Bezel | Bidirectional 24-hour | Bidirectional 24-hour |
| Bezel material | Bakelite (red/blue), later aluminium | Aluminium insert (Pepsi or black) |
| Crystal | Acrylic | Acrylic |
| Crown | No crown guards | Crown guards |
| Water resistance | 50m | 100m |
| Dial | Black | Black |
| Dial configuration | — | Matte then glossy with white-gold surrounds |
| Hands | Mercedes + 24h arrow | Mercedes + 24h arrow |
| Lume | Radium | Tritium |
| Lume type | Radium | Tritium |
| Movement | Automatic | Automatic |
| Caliber | 1036 / 1066 | 3075 |
| Manufacturer | Rolex | Rolex |
| Winding | automatic | automatic |
| Frequency | — | 28,800 vph |
| Functions | Hours, minutes, seconds, date, 24h GMT | Hours, minutes, seconds, quickset date, 24h GMT |
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