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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1154919/movement
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1154919/movement
Access Date: November 29, 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: | 1154919 | |
| Grade: | Series 10 | |
| Model: | 1907 | |
| Estimated Production Year: | 1913 | |
| Run Quantity: | 800 | |
| Grade/Model Run: | 11 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: | 252.G11.16S172.161907M68.O170.L48.21J34 | |
| Database Version: | v52.470 | |
| 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 (0.75%) | |
| $ Estimated Value (12 Month Change): | 13.12% Analyzing 174 Sales | |
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.
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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 · April 19, 2022
Serial Number 1154981 was reported as accurate.
timekeeper48 Supporter 88 · November 26, 2021
Serial Number 1154470 was reported as accurate.
Anonymous · July 20, 2021
Serial Number 1154914 was reported as inaccurate.
Note: Lever set RR grade
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
Anonymous · July 11, 2021
Serial Number 1154914 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 · September 17, 2020
Serial Number 1154759 was reported as inaccurate.
Note: This one is a series 10 lever set and is Railroad
grade.
grade.
Curator Response: Thanks for the report. This is a mixed run with lever-set and pendant-set movement. The lever-set movements would have qualified for railroad service, as you correctly indicated.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
Anonymous · September 17, 2020
Serial Number 1154759 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 22, 2019
Serial Number 1154683 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 · November 3, 2018
Serial Number 1154412 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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