Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1286717
Access Date: April 17, 2025
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: | 1286717 | |
| Grade: | Series 8 | |
| Model: | 1912 | |
| Estimated Production Year: | 1916 | |
| Run Quantity: | 3,800 | |
| Grade/Model Run: | 10 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: | Micrometric | |
| 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. 23 Jewels [Cross in Arrow] Pat'd '12 Five Positions And Temperature Special Adjustment |
|
| Case: | Various | |
| Run ID: | 307.G26.12S79.121912M32.O219.P215.23J46 | |
| Database Version: | v52.636 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 28.63 | |
| 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 | 16 (0.42%) | |
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 16 watches in the population registry for this run with 1 image.
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Help Us Help Others By Improving the Database:
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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.
Anonymous · May 8, 2024
Serial Number 1288896 was reported as accurate.
Anonymous · August 27, 2022
Serial Number 1286517 was reported as accurate.
Anonymous · July 8, 2022
Serial Number 1287517 was reported as accurate.
cmdraven 4102 · June 10, 2022
Serial Number 1286635 was reported as accurate.
Anonymous · April 21, 2022
Serial Number 1288735 was reported as accurate.
Anonymous · December 19, 2021
Serial Number 1288615 was reported as accurate.
Huggs3 Supporter 145 · August 17, 2021
Serial Number 1286811 was reported as accurate.
Anonymous · April 19, 2021
Serial Number 1287982 was reported as accurate.
Anonymous · March 24, 2021
Serial Number 1287129 was reported as accurate.
Anonymous · December 7, 2020
Serial Number 1286717 was reported as accurate.
Anonymous · November 3, 2020
Serial Number 1289627 was reported as accurate.
Mattphilly 7 · September 21, 2020
Serial Number 1286717 was reported as accurate.
Pablos 8 · September 8, 2020
Serial Number 1287858 was reported as accurate.
Pablos 8 · September 1, 2020
Serial Number 1287858 was reported as accurate.
bunnofnickle 67 · July 27, 2020
Serial Number 1288651 was reported as accurate.
Anonymous · June 28, 2020
Serial Number 1288651 was reported as accurate.
Anonymous · May 1, 2020
Serial Number 1287576 was reported as accurate.
Fatherbeef 1 · February 29, 2020
Serial Number 1287337 was reported as inaccurate.
Anonymous · October 28, 2019
Serial Number 1288202 was reported as accurate.
Anonymous · May 5, 2019
Serial Number 1286955 was reported as accurate.
