Pocket Watch Database
E. Howard Watch Co. (Keystone) Grade Series 12 (Model 1921) Production Metrics
Grade:
Series 12
Size:
10s
Model:
1921
Total Runs:
5
Total Produced:
47,450
Production Era:
1921 - 1928
Earliest Serial:
#12,001
Latest Serial:
#63,450
E. Howard Watch Co. (Keystone) Grade Series 12 (Model 1921) Production By Year
Production dates are estimations based on serial number extrapolation and should be accurate within +/- 3 years.
[1921,1922,1923,1924,1925,1927,1928]
[6500,6500,6500,6500,4000,4000,13450]
E. Howard Watch Co. (Keystone) Grade Series 12 (All Models) Production Metrics
Grade:
Series 12
Size:
10s
Model:
1921
Total Runs:
5
Total Produced:
47,450
Production Era:
1921 - 1928
Earliest Serial:
#12,001
Latest Serial:
#63,450
E. Howard Watch Co. (Keystone) Grade Series 12 Production By Year
Production dates are estimations based on serial number extrapolation and should be accurate within +/- 3 years.
[1921,1922,1923,1924,1925,1926,1927,1928]
[6500,6500,6500,6500,4000,0,4000,13450]
E. Howard Watch Co. (Keystone) Grade Series 12 Production Runs
| Run Sequence | Run Start | Run End | Quantity | Est. Production Year | Profile Code |
|---|---|---|---|---|---|
| 1 | 12,001 | 38,000 | 26,000 | 1921 | 10S-M1921-17J-ONP-A3PTI |
| 2 | 39,001 | 43,000 | 4,000 | 1925 | 10S-M1921-17J-ONP-A3PTI |
| 3 | 44,001 | 48,000 | 4,000 | 1927 | 10S-M1921-17J-ONP-A3PTI |
| 4 | 49,001 | 52,000 | 3,000 | 1928 | 10S-M1921-17J-ONP-A3PTI |
| 5 | 53,001 | 63,450 | 10,450 | 1928 | 10S-M1921-17J-ONP-A3PTI |
RUNS5 |
FIRST12,001 |
LAST63,450 |
ESTIMATED PRODUCTION47,450 |
PRODUCTION ERA1921 - 1928 |