Pocket Watch Database
E. Howard Watch Co. (Keystone) Size 10s Model 1921: Overview & Production
Model 1921 Features
Movement Diagram
Note: Diagrams and photos displayed are intended to serve as a represenation of this model.
Plate cut, finishing style, jewel count, regulator, and other features may differ between grades within the same model designation.
Plate cut, finishing style, jewel count, regulator, and other features may differ between grades within the same model designation.
| Size | 10s |
| Configuration | Openface |
| Plate | Bridge |
| Setting | Pendant |
| Finish | Nickel |
| Model 1921 Image Gallery | |
Model 1921 Production
| Total Production: | ~61,950 |
| Est. Production Years: | 1920 - 1928 |
| Earliest Serial: | 1,501 |
| Latest Serial: | 63,450 |
| Runs: | ~15 |
| Smallest Run: | 100 |
| Largest Run: | 26,000 |
| Distinctive Grades: | 4 |
Model 1921 Production Segments
| Model 1921 (All Variations): 61,950 ETP |
| Nickel: 61,950 (100.00%) |
| Openface: 61,950 (100.00%) |
| Pendant: 61,950 (100.00%) |
| ?j: 1,000 (1.61%) | 17j: 47,450 (76.59%) | 19j: 5,000 (8.07%) | 21j: 8,400 (13.56%) | 23j: 100 (0.16%) |