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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 |
| Type | Manual / Trench |
| Diameter (Lignes) | 13''' |
| Jewel Count | 15 Jewels |
| Oscillation Frequency | 18,000 BPH (2.5 Hz) |
| Lift Angle | 52° |
| Era | 1910-1925 |
| Power Reserve | 36 hours |
| Escapement Type | Double roller lever escapement |
| Balance Wheel Construction | Bimetallic compensation balance with gold screws |
| Hairspring Specification | Blued steel Breguet spring |
| Shock Protection System | Rigid balance jewels |
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 51° lift angle, this movement exemplifies vintage fine watchmaking standards. Restored and wristwatch-converted examples of this caliber can be viewed at View Available Converted Pocket Watches.
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