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1675 vs 6542
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| Specification | ||
|---|---|---|
| Nickname | Pepsi | — |
| Production | 1959–1980 | 1954–1959 |
| Era | Crown-guard vintage | First GMT-Master |
| Status | discontinued | discontinued |
| Case diameter | 40mm | 38mm |
| Case material | Stainless steel (also two-tone/gold) | Stainless steel |
| Bezel | Bidirectional 24-hour | Bidirectional 24-hour |
| Bezel material | Aluminium insert (Pepsi or all-black) | Bakelite (red/blue), later aluminium |
| Crystal | Acrylic | Acrylic |
| Crown | Crown guards (pointed 'PCG' early, then round) | No crown guards |
| Water resistance | 50m | 50m |
| Dial | Black | Black |
| Dial configuration | Gilt then matte; 'nipple' markers on gold dials | — |
| Hands | Mercedes + 24h arrow | Mercedes + 24h arrow |
| Lume | Tritium (radium earliest) | Radium |
| Lume type | Tritium | Radium |
| Movement | Automatic | Automatic |
| Caliber | 1565 / 1575 | 1036 / 1066 |
| Manufacturer | Rolex | Rolex |
| Winding | automatic | automatic |
| Functions | Hours, minutes, seconds, date, 24h GMT | Hours, minutes, seconds, date, 24h GMT |
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