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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1238550/movement
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1238550/movement
Access Date: November 25, 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:
-Series10-16s.jpg)
E. Howard Watch Co. (Keystone)
Grade: Series 10
| Manufacturer: | E. Howard Watch Co. (Keystone) |  |
| Manufacturer Location: | Waltham, Massachusetts | |
| Movement Serial Number: | 1238550 | |
| Grade: | Series 10 | |
| Model: | 1907 | |
| Estimated Production Year: | 1913 | |
| Run Quantity: | 1,000 | |
| Grade/Model Run: | 16 of 21 | |
| Grade/Model Total Production: | 17,800 | |
| Variant Est. Production: | 15,650 (16S-M1907-21J-ONL) | |
| Size: | 16s | |
| Jewels: | 21j | |
| Jewel Setting: | Burnished Jewels | |
| Movement Configuration: | Openface | |
| Movement Finish: | Nickel | |
| Finish Pattern: | Parallel | |
| Movement Inlay Color: | Black | |
| Movement Setting: | Lever | |
| Plate: | Bridge Plate | |
| Bridge Type: | Center | |
| Double Roller: | Yes | |
| Barrel: | Going | |
| Regulator: | Reed | |
| Hairspring: | Breguet | |
| Standard Dial Type: | Double-Sunk | |
| Adjusted: | Yes | |
| Adjusted to Position: | Yes | |
| Adjusted # of Positions: | 5 | |
| Adjusted to Temperature: | Yes | |
| Adjusted to Isochronism: | Yes | |
| Railroad Grade: | Yes | |
| Dial Feet Locations: | 10.7, 24.3, 48.9 | |
| Movement Markings: | E. Howard Watch Co. Boston U.S.A. 21 Jewels Series 10 [Star in Arrow] Pat'd. '10 Extra Adjustment Five Positions Temperature |
|
| Case: | Various | |
| Run ID: | 283.G16.16S183.161907M76.O198.L57.21J41 | |
| Database Version: | v52.462 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 53.59 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 188.45 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 3.407% | |
| Registry Population: Scoped for This Run Only | 6 (0.60%) | |
| $ Estimated Value (12 Month Change): | 13.12% Analyzing 174 Sales | |
|
Research Note: Ruby Banking Pins. #1238110: Reported as Pendant-Set. #1238184: Verified as Lever-Set.
|
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Production Metrics Tree: Grade Series 10
Target Profile: 16S-M1907-21J-ONL-A5PTI
| E. Howard Watch Co. (Keystone) Grade Series 10 (All Variations): 17,800 ETP | |
| 16S: 17,800 100.00% 16s, Grade Series 10 |
|
| 16S-M1907: 17,800 100.00% 16s, Grade Series 10, Model 1907 |
|
| 16S-M1907-21J: 17,800 100.00% 16s, Grade Series 10, Model 1907, 21 Jewels |
|
| 16S-M1907-21J-ONL: 15,650 87.92% 16s, Grade Series 10, Model 1907, 21 Jewels, Openface/Lever/Nickel |
Other: 2,150
Other Configs or Unclassified |
| 16S-M1907-21J-ONL-A5PTI: 15,650 87.92% | |
Population Registry for This Run
| Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
|---|---|---|---|---|---|
|
There are 6 watches in the population registry for this run with 3 images.
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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.
Anonymous · August 26, 2023
Serial Number 1238865 was reported as accurate.
Anonymous · December 28, 2022
Serial Number 1238057 was reported as accurate.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
dai4583 58 · February 15, 2022
Serial Number 1238007 was reported as inaccurate.
Note: This watch is lever set so should be rail road
grade
grade
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:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
sean813 5 · December 18, 2021
Serial Number 1238725 was reported as inaccurate.
Note: Should be Railroad Grade.
Curator Response: This is a mixed run. If your watch is lever-set, then yes, it would be approved for railroad service.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
Anonymous · December 6, 2021
Serial Number 1238330 was reported as accurate.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
Anonymous · January 6, 2021
Serial Number 1238184 was reported as accurate.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
Anonymous · August 10, 2020
Serial Number 1238485 was reported as accurate.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
Anonymous · April 11, 2020
Serial Number 1238144 was reported as accurate.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
Anonymous · March 10, 2020
Serial Number 1238184 was reported as accurate.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
dai4583 58 · August 22, 2019
Serial Number 1238007 was reported as accurate.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
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