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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1000214-series_0/movement
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1000214-series_0/movement
Access Date: December 11, 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:
-Series0-16s.jpg)
E. Howard Watch Co. (Keystone)
Grade: Series 0
| Manufacturer: | E. Howard Watch Co. (Keystone) |  |
| Manufacturer Location: | Waltham, Massachusetts | |
| Movement Serial Number: | 1000214 | |
| Grade: | Series 0 | |
| Variation: | Straight Bridge Jeweled Barrel | |
| Model: | Bridge | |
| Estimated Production Year: | 1903 | |
| Run Quantity: | 600 | |
| Grade/Model Run: | 1 of 2 | |
| Grade/Model Total Production: | 700 | |
| Variant Est. Production: | 600 (16S-MBRIDGE-23J-HNP) | |
| Size: | 16s | |
| Jewels: | 23j | |
| Jewel Material: | Ruby & Sapphire | |
| Jewel Setting: | Raised Gold Settings (Screw-Set) | |
| Movement Configuration: | Hunting | |
| Movement Finish: | Nickel | |
| Finish Pattern: | Paralell | |
| Movement Setting: | Pendant | |
| Plate: | Bridge Plate | |
| Double Roller: | Yes | |
| 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 | |
| U.S. Patents: | 796162, 886387, 900183, 978612, 981667, 1062645 | |
| Movement Markings: | E. Howard Watch Co. Boston U.S.A. Adjusted 23 Jewels |
|
| Case: | Various | |
| Run ID: | 137.G7.16S107.M1.H48.P114.23J9 | |
| Database Version: | v52.504 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 1.80 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 6.25 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 0.115% | |
| Registry Population: Scoped for This Run Only | 7 (1.17%) | |
| $ Estimated Value (12 Month Change): | -1.35% Analyzing 95 Sales | |
|
Research Note: Production Note: Waltham-era production serial numbers collide with later production. The 23-Jewel movements were manufactured by Waltham for the E. Howard Watch Co., while the 17-Jewel movements were manufactured by E. Howard in a later era. The serial numbers for these production blocks overlap up to approximately serial 1000600.
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Production Metrics Tree: Grade Series 0
Target Profile: 16S-MBRIDGE-23J-HNP-A5PTI-STRAIGHT BRIDGE JEWELED BARREL
| E. Howard Watch Co. (Keystone) Grade Series 0 (All Variations): 16,600 ETP | ||
| 16S: 16,600 100.00% 16s, Grade Series 0 |
||
| 16S-MBRIDGE: 700 4.22% 16s, Grade Series 0, Model Bridge |
Other: 15,900
Other Models or Unclassified |
|
| 16S-MBRIDGE-23J: 700 4.22% 16s, Grade Series 0, Model Bridge, 23 Jewels |
||
| 16S-MBRIDGE-23J-HNP: 600 3.61% 16s, Grade Series 0, Model Bridge, 23 Jewels, Hunting/Pendant/Nickel |
Other: 100
Other Configs or Unclassified |
|
| 16S-MBRIDGE-23J-HNP-A5PTI: 600 3.61% | ||
| 16S-MBRIDGE-23J-HNP-A5PTI-STRAIGHT BRIDGE JEWELED BARREL: 600 3.61% | ||
Population Registry for This Run
| Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
|---|---|---|---|---|---|
|
There are 7 watches in the population registry for this run with 2 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 · September 16, 2024
Serial Number 1000535 was reported as accurate.
Changes since this report was submitted:
Factory Model changed from 1903 to Bridge
Railroad Grade changed from No to Yes
Anonymous · June 25, 2023
Serial Number 1000112 was reported as inaccurate.
Note: This movement is stamped 17 jewels, not 23.
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:
Factory Model changed from 1903 to Bridge
Railroad Grade changed from No to Yes
Anonymous · June 27, 2021
Serial Number 1000458 was reported as accurate.
Changes since this report was submitted:
Factory Model changed from 1903 to Bridge
Railroad Grade changed from No to Yes
Anonymous · June 23, 2021
Serial Number 1000139 was reported as accurate.
Changes since this report was submitted:
Factory Model changed from 1903 to Bridge
Railroad Grade changed from No to Yes
Anonymous · October 6, 2019
Serial Number 1000412 was reported as inaccurate.
Note: Watch has inscription date of June 1909
Curator Response: Thanks for the report. Due to the method of production at the E. Howard (Keystone) factory, estimated production dates are expected to be within +/- 3 years.
Changes since this report was submitted:
Factory Model changed from 1903 to Bridge
Railroad Grade changed from No to Yes
ralph1 113 · July 12, 2019
Serial Number 1000518 was reported as inaccurate.
Note: 16 size open face, 17 jewel adjusted. pat.D.08
E Howard Watch Co Boston USA, .S #1000518
E Howard Watch Co Boston USA, .S #1000518
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection so we can take a closer look.
Changes since this report was submitted:
Factory Model changed from 1903 to Bridge
Railroad Grade changed from No to Yes
