Pocket Watch Database
Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1230552
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1230552
Access Date: April 18, 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:
-Series8-12s.jpg)
E. Howard Watch Co. (Keystone)
Grade: Series 8
| Manufacturer: | E. Howard Watch Co. (Keystone) |  |
| Manufacturer Location: | Waltham, Massachusetts | |
| Movement Serial Number: | 1230552 | |
| Grade: | Series 8 | |
| Model: | 1912 | |
| Estimated Production Year: | 1913 | |
| Run Quantity: | 500 | |
| Grade/Model Run: | 5 of 10 | |
| Grade/Model Total Production: | 8,450 | |
| Variant Est. Production: | 7,650 (12S-M1912-23J-ONP) | |
| Size: | 12s | |
| Jewels: | 23j | |
| Movement Configuration: | Openface | |
| Movement Finish: | Nickel | |
| Movement Setting: | Pendant | |
| Plate: | Bridge Plate | |
| Double Roller: | Yes | |
| Hairspring: | Breguet | |
| Adjusted: | Yes | |
| Adjusted # of Positions: | 5 | |
| Adjusted to Temperature: | Yes | |
| Railroad Grade: | No | |
| Case: | Various | |
| Run ID: | 275.G21.12S63.121912M18.O175.P179.23J34 | |
| Database Version: | v52.235 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 23.03 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 76.48 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 1.481% | |
| Registry Population: | 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): 13,400 ETP | |||
| 12S: 13,400 100.00% 12s, Grade Series 8 |
|||
| 12S-M1912: 8,450 63.06% 12s, Grade Series 8, Model 1912 |
Other: 4,950
Other Models or Unclassified |
||
| 12S-M1912-23J: 8,450 63.06% 12s, Grade Series 8, Model 1912, 23 Jewels |
|||
| 12S-M1912-23J-ONP: 7,650 57.09% 12s, Grade Series 8, Model 1912, 23 Jewels, Openface/Pendant/Nickel |
Other: 800
Other Configs or Unclassified |
||
| 12S-M1912-23J-ONP-A5PT: 7,650 57.09% | |||
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.
chn006 1 · September 27, 2022
Serial Number 1230552 was reported as inaccurate.
Note: Serial Number 1230552, 14K Yellow Gold, 23 Jewels.
Curator Response: Thanks for the report. The database has been updated accordingly.
Changes since this report was submitted:
Grade changed from Series 6 to Series 8
Jewels changed from 19j to 23j
dar505 22 · August 1, 2021
Serial Number 1230953 was reported as inaccurate.
Note: mine is a 23 jewel movement
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Grade changed from Series 6 to Series 8
Jewels changed from 19j to 23j
Anonymous · May 11, 2021
Serial Number 1230953 was reported as inaccurate.
Note: 23 jewels
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Grade changed from Series 6 to Series 8
Jewels changed from 19j to 23j
snellingt Supporter 32 · August 21, 2020
Serial Number 1230714 was reported as inaccurate.
Note: 23 jewel 5 pos 3 finger bg
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Grade changed from Series 6 to Series 8
Jewels changed from 19j to 23j
Anonymous · August 10, 2019
Serial Number 1230552 was reported as inaccurate.
No further details were submitted with the report.
Changes since this report was submitted:
Grade changed from Series 6 to Series 8
Jewels changed from 19j to 23j
