Pocket Watch Database
E. Howard Watch Co. (Keystone) Size 10s Model 1921: Grades
Model 1921 Grades
| Grade | Total Grade/Model Production | Runs | Est. Production Years | Earliest Serial | Latest Serial | Profile Code |
|---|---|---|---|---|---|---|
| Missing Data | 1,000 | 1 | 1921 - 1921 | 4,001 | 5,000 | 10s-M1921-ONP-U |
| Series 12 | 47,450 | 5 | 1921 - 1928 | 12,001 | 63,450 | 10s-M1921-17j-ONP |
| Series 14 | 8,400 | 6 | 1920 - 1927 | 1,501 | 49,000 | 10s-M1921-21j-ONP |
| Series 15 | 5,000 | 2 | 1921 - 1928 | 8,001 | 53,000 | 10s-M1921-19j-ONP |
| Unknown | 100 | 1 | 1920 - 1920 | 1,901 | 2,000 | 10s-M1921 |