Pocket Watch Database
Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1106644/movement
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1106644/movement
Access Date: December 14, 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: | 1106644 | |
| Grade: | Series 8 | |
| Model: | 1912 | |
| Estimated Production Year: | 1911 | |
| Run Quantity: | 750 | |
| Grade/Model Run: | 2 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 | |
| Standard Dial Type: | Single-Sunk | |
| 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 Pat'd '08 Five Positions and Temperature Special Adjustment |
|
| Case: | Various | |
| Run ID: | 203.G11.12S34.121912M2.O125.P155.23J24 | |
| Database Version: | v52.508 | |
| 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% | |
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% | ||
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.
ebsrods Supporter 130 · March 18, 2021
Serial Number 1106706 was reported as inaccurate.
Note: movement marked 23 jewel not 21.
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:
Jewels changed from 21j to 23j
Factory Model changed from 1908 to 1912
