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Rolex Caliber 300 Movement Specifications, Beat Rate & Dimensions |
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Technical Caliber Datasheet
| Manufacturer | Rolex |
| Caliber Reference | Caliber 300 |
| Movement Type | Manual / Trench |
| Diameter (Lignes) | 13''' |
| Diameter (mm) | 29.3 |
| Movement Thickness | 4.8 |
| Jewel Count | 15 Jewels |
| Vibrations Per Hour | 18,000 BPH (2.5 Hz) |
| Balance Lift Angle | 52° |
| Power Reserve | 38 hours |
| Escapement Type | Swiss straight line lever |
| Shock Protection System | Solid chatons (No shock) |
| Production Era | 1910-1925 |
| Wristwatch Conversion Rating | Native trench case / 38-42mm cage |
Historical & Mechanical Notes
The Rolex Caliber 300 is revered among horologists for its mechanical architecture and precision timing characteristics. Operating with an oscillation rate of 18,000 BPH and a 52° lift angle, this movement exemplifies vintage fine watchmaking standards. Restored and wristwatch-converted examples of this caliber can be viewed at See Available Converted Pocket Watches.
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