Grade: 991
| Manufacturer: | Hamilton |  |
| Manufacturer Location: | Lancaster, Pennsylvania | |
| Movement Serial Number: | 395338 | |
| Grade: | 991 | |
| Model: | 1 | |
| Estimated Production Year: | 1907 | |
| Run Quantity: | 800 | |
| Grade/Model Run: | 5 of 9 | |
| Grade/Model Total Production: | 2,520 | |
| Size: | 16s | |
| Jewels: | 21j | |
| Jewel Material: | Ruby & Sapphire | |
| Jewel Setting: | Gold Settings (Screw-Set) | |
| Movement Configuration: | Hunting | |
| Movement Finish: | Nickel | |
| Movement Setting: | Lever | |
| Plate: | 3/4 Plate | |
| Barrel: | Going | |
| Regulator: | Reed | |
| Hairspring: | Breguet | |
| Pallet Jewel Material: | Sapphire | |
| Standard Dial Type: | Double-Sunk | |
| Adjusted: | Yes | |
| Adjusted to Position: | Yes | |
| Adjusted # of Positions: | 5 | |
| Adjusted to Temperature: | Yes | |
| Adjusted to Isochronism: | Yes | |
| Railroad Grade: | Yes |