Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/49315
Access Date: December 23, 2024
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.
From the American Horology Archive:
E. Howard Watch Co. (Keystone)
Grade: Series 12
Manufacturer: | E. Howard Watch Co. (Keystone) | |
Manufacturer Location: | Waltham, Massachusetts | |
Movement Serial Number: | 49315 | |
Grade: | Series 12 | |
Model: | 1921 | |
Estimated Production Year: | 1928 | |
Run Quantity: | 3,000 | |
Grade/Model Run: | 4 of 5 | |
Grade/Model Total Production: | 47,450 | |
Size: | 10s | |
Jewels: | 17j | |
Movement Configuration: | Openface | |
Movement Finish: | Nickel | |
Finish Pattern: | Standard Stripe | |
Movement Setting: | Pendant | |
Plate: | Bridge Plate | |
Regulator: | Plain | |
Hairspring: | Breguet | |
Adjusted: | Yes | |
Adjusted to Position: | Yes | |
Adjusted # of Positions: | 3 | |
Adjusted to Temperature: | Yes | |
Adjusted to Isochronism: | Yes | |
Railroad Grade: | No | |
Movement Markings: | E. Howard Watch Co. Boston, U.S.A. [Empty Circle in Arrow] 17J Pat'd. '21 |
|
Case: | Various | |
Run ID: | 14.G4.10S13.101921M13.O14.P14.17J4 | |
Database Version: | v52.518 | |
Advanced Metrics | ||
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 142.86 | |
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 502.54 | |
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 9.075% | |
Registry Population: Scoped for This Run Only | 5 (0.17%) |
Production Metrics Tree: Grade Series 12
Target Profile: 10S-M1921-17J-ONP-A3PTI
E. Howard Watch Co. (Keystone) Grade Series 12 (All Variations): 47,450 ETP |
10S: 47,450 100.00% 10s, Grade Series 12 |
10S-M1921: 47,450 100.00% 10s, Grade Series 12, Model 1921 |
10S-M1921-17J: 47,450 100.00% 10s, Grade Series 12, Model 1921, 17 Jewels |
10S-M1921-17J-ONP: 47,450 100.00% 10s, Grade Series 12, Model 1921, 17 Jewels, Openface/Pendant/Nickel |
10S-M1921-17J-ONP-A3PTI: 47,450 100.00% |
Population Registry for This Run
Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
---|---|---|---|---|---|
There are 5 watches in the population registry for this run with 2 images.
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Verification Reports for this Run
The following reports have been graciously submitted by dedicated members in reference to this production run. These reports are useful to verify data and track inaccuracies that require further research. Please note that reports may contain inaccurate information or assumptions that must be dilligently considered with other available sources.
TerryfromCanada Supporter 486 · November 27, 2021
Serial Number 49459 was reported as accurate.
Rcardkidz 4123 · November 26, 2021
Serial Number 49481 was reported as accurate.
mikegoldnj 1 · April 21, 2021
Serial Number 49315 was reported as accurate.
MoatsJustin1 top-contributor 5272 · December 31, 2020
Serial Number 51175 was reported as accurate.
KBean001 34 · July 4, 2020
Serial Number 50640 was reported as accurate.
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