Compare Studio
6538 vs 5512
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| Specification | ||
|---|---|---|
| Nickname | Big Crown | — |
| Production | 1955–1959 | 1959–1978 |
| Era | 1950s big-crown divers | Crown-guard vintage |
| Status | discontinued | discontinued |
| Case diameter | 38mm | 40mm |
| Case material | Stainless steel | Stainless steel |
| Bezel | Bidirectional 60-minute (early) diver bezel | Unidirectional 60-minute |
| Bezel material | Aluminium insert | Aluminium insert |
| Crystal | Acrylic | Acrylic |
| Crown | Oversized 8mm 'Big Crown' Twinlock, no crown guards | Triplock / Twinlock (era-dependent), with crown guards |
| Caseback type | Screw-down solid | Screw-down solid |
| Water resistance | 200m | 200m |
| Dial | Black | Black |
| Dial configuration | Gilt gloss, 4-line / 2-line variants | 4-line, chronometer-certified |
| Hour markers | Painted with gilt surrounds | — |
| Hands | Pencil hands | Mercedes hands |
| Lume | Radium | Tritium |
| Lume type | Radium | Tritium |
| Movement | Automatic | Automatic |
| Caliber | 1030 | 1530 / 1560 / 1570 |
| Manufacturer | Rolex | Rolex |
| Winding | automatic | automatic |
| Functions | Hours, minutes, seconds | Hours, minutes, seconds |
| Aliases | 6538A | — |
Compare 6538 with another generation