Due to the lack of existing factory records, our E. Howard Watch Co. (Keystone) database has been reconstructed using observations of known watches.
As a result, the information may contain inaccuracies. Please let us know if you have details that can improve the database.
Manufacturer: | E. Howard Watch Co. (Keystone) | ![]() |
Manufacturer Location: | Waltham, Massachusetts | ![]() |
Movement Serial Number: | 859657 | ![]() |
Grade: | Series 3 | ![]() |
Model: | 1905 | ![]() |
Estimated Production Year: | 1902 | ![]() |
Run Quantity: | 500 | ![]() |
Total Production: | 59,700 | ![]() |
Size: | 16s | ![]() |
Jewels: | 17j | ![]() |
Jewel Material: | Ruby & Sapphire | ![]() |
Jewel Setting: | Gold Settings (Screw-Set) | ![]() |
Movement Configuration: | Openface | ![]() |
Movement Finish: | Nickel | ![]() |
Finish Pattern: | Circular | ![]() |
Movement Setting: | Pendant | ![]() |
Plate: | 3/4 Plate | ![]() |
Regulator: | Reed | ![]() |
Hairspring: | Breguet | ![]() |
Pallet Jewel Material: | Sapphire | ![]() |
Standard Dial Type: | Single-Sunk | ![]() |
Adjusted: | Yes | ![]() |
Adjusted to Position: | Yes | ![]() |
Adjusted # of Positions: | 3 | ![]() |
Adjusted to Temperature: | Yes | ![]() |
Adjusted to Isochronism: | Yes | ![]() |
Dial Feet Locations: | 10.7, 24.3, 48.9 | ![]() |
U.S. Patents: | 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667 | ![]() |
Research Note: #859553: Reported as Lever-Set |