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18238 vs 1803
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| Specification | ||
|---|---|---|
| Nickname | President | President |
| Production | 1988–2000 | 1959–1977 |
| Era | Double-quickset 3155 | Vintage acrylic |
| Status | discontinued | discontinued |
| Case diameter | 36mm | 36mm |
| Case material | 18k gold | 18k gold / platinum |
| Bezel | Fluted | Fluted |
| Crystal | Sapphire with Cyclops | Acrylic |
| Caliber | 3155 | 1555 / 1556 |
| Manufacturer | Rolex | Rolex |
| Winding | automatic | automatic |
| Functions | — | Hours, minutes, seconds, date, day |
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