Hamilton Watch Co.
Grade: 920
| Manufacturer: | Hamilton |  |
| Manufacturer Location: | Lancaster, Pennsylvania | |
| Movement Serial Number: | 1831643 | |
| Grade: | 920 | |
| Model: | 1 | |
| Estimated Production Year: | 1919 | |
| Run Quantity: | 1,000 | |
| Grade/Model Run: | 5 of 15 | |
| Grade/Model Total Production: | 14,600 | |
| Size: | 12s | |
| Jewels: | 23j | |
| Jewel Material: | Ruby or Ruby & Sapphire | |
| Jewel Setting: | Gold Settings (Screw-Set) | |
| Movement Configuration: | Openface | |
| Movement Finish: | Nickel | |
| Movement Setting: | Pendant | |
| Plate: | Bridge Plate | |
| Balance Type: | Compensation | |
| Train Material: | Gold | |
| Center Wheel Material: | Gold | |
| Regulator: | Reed | |
| Hairspring: | Breguet | |
| Pallet Jewel Material: | Sapphire | |
| Adjusted: | Yes | |
| Adjusted to Position: | Yes | |
| Adjusted # of Positions: | 5 | |
| Adjusted to Temperature: | Yes | |
| Adjusted to Isochronism: | Yes | |
| Railroad Grade: | No | |
| Dial Feet Locations: | 10.5, 38.5, 56.0 | |
| Data Research: | 1953 Hamilton Serial List | |
| Case: | Various |