Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1204935/movement
Access Date: December 30, 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:
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E. Howard Watch Co. (Keystone)
Grade: Series 8
| Manufacturer: | E. Howard Watch Co. (Keystone) |  |
| Manufacturer Location: | Waltham, Massachusetts | |
| Movement Serial Number: | 1204935 | |
| Grade: | Series 8 | |
| Model: | 1912 | |
| Estimated Production Year: | 1913 | |
| Run Quantity: | 500 | |
| Grade/Model Run: | 4 of 10 | |
| Grade/Model Total Production: | 9,950 | |
| Variant Est. Production: | 9,450 (12S-M1912-23J-ONP) | |
| Size: | 12s | |
| Jewels: | 23j | |
| Jewel Setting: | Burnished Jewels | |
| Movement Configuration: | Openface | |
| Movement Finish: | Nickel | |
| Movement Setting: | Pendant | |
| Plate: | Bridge Plate | |
| Double Roller: | Yes | |
| Regulator: | Reed | |
| Hairspring: | Breguet | |
| Adjusted: | Yes | |
| Adjusted # of Positions: | 5 | |
| Adjusted to Temperature: | Yes | |
| Railroad Grade: | No | |
| Movement Markings: | E. Howard Watch Co. Boston U.S.A. Adjusted 23 Jewels Pat'd '12 Five Positions And Temperature Special Adjustment |
|
| Case: | Various | |
| Run ID: | 273.G20.12S58.121912M13.O188.P191.23J37 | |
| Database Version: | v52.529 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 28.45 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 100.00 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 1.807% | |
| Registry Population: Scoped for This Run Only | 2 (0.40%) | |
Production Metrics Tree: Grade Series 8
Target Profile: 12S-M1912-23J-ONP-A5PT
| E. Howard Watch Co. (Keystone) Grade Series 8 (All Variations): 14,400 ETP | ||
| 12S: 14,400 100.00% 12s, Grade Series 8 |
||
| 12S-M1912: 9,950 69.10% 12s, Grade Series 8, Model 1912 |
Other: 4,450
Other Models or Unclassified |
|
| 12S-M1912-23J: 9,950 69.10% 12s, Grade Series 8, Model 1912, 23 Jewels |
||
| 12S-M1912-23J-ONP: 9,450 65.63% 12s, Grade Series 8, Model 1912, 23 Jewels, Openface/Pendant/Nickel |
Other: 500
Other Configs or Unclassified |
|
| 12S-M1912-23J-ONP-A5PT: 9,450 65.63% | ||
Population Registry for This Run
| Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
|---|---|---|---|---|---|
|
There are 2 watches in the population registry for this run with 1 image.
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Help Us Help Others By Improving the Database:
Does this information describe your movement accurately?
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.
nicnic Supporter 406 · June 10, 2021
Serial Number 1204935 was reported as accurate.
Anonymous · February 23, 2021
Serial Number 1204997 was reported as accurate.
guyirun 51 · December 17, 2019
Serial Number 1204560 was reported as accurate.
Anonymous · November 25, 2019
Serial Number 1204560 was reported as accurate.
