Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1000267-series_0
Access Date: May 12, 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: | 1000267 | |
| Grade: | Series 0 | |
| Model: | 1903 | |
| Estimated Production Year: | 1911 | |
| Run Quantity: | 750 | |
| Grade/Model Run: | 1 of 1 | |
| Grade/Model Total Production: | 750 | |
| Size: | 16s | |
| Jewels: | 23j | |
| Jewel Material: | Ruby & Sapphire | |
| Movement Configuration: | Hunting | |
| Movement Finish: | Nickel | |
| 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: | No | |
| U.S. Patents: | 796162, 886387, 900183, 978612, 981667, 1062645 | |
| Case: | Various | |
| Run ID: | 131.G7.16S101.161903M1.H46.P104.23J7 | |
| Database Version: | v52.270 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 2.26 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 7.41 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 0.145% | |
| Registry Population: | 6 (0.80%) | |
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Research Note: Production Note: Run serial numbers collide with later production.
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Production Metrics Tree: Grade Series 0
Target Profile: 16S-M1903-23J-HNP-A5PTI
| E. Howard Watch Co. (Keystone) Grade Series 0 (All Variations): 17,250 ETP | |
| 16S: 17,250 100.00% 16s, Grade Series 0 |
|
| 16S-M1903: 750 4.35% 16s, Grade Series 0, Model 1903 |
Other: 16,500
Other Models or Unclassified |
| 16S-M1903-23J: 750 4.35% 16s, Grade Series 0, Model 1903, 23 Jewels |
|
| 16S-M1903-23J-HNP: 750 4.35% 16s, Grade Series 0, Model 1903, 23 Jewels, Hunting/Pendant/Nickel |
|
| 16S-M1903-23J-HNP-A5PTI: 750 4.35% | |
Population Registry for This Run
| Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
|---|---|---|---|---|---|
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There are 6 watches in the population registry for this run with 1 image.
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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 · June 25, 2023
Serial Number 1000112 was reported as inaccurate.
Anonymous · June 27, 2021
Serial Number 1000458 was reported as accurate.
Anonymous · June 23, 2021
Serial Number 1000139 was reported as accurate.
Anonymous · October 6, 2019
Serial Number 1000412 was reported as inaccurate.
Anonymous · August 29, 2019
Serial Number 1000730 was reported as inaccurate.
ralph1 107 · July 12, 2019
Serial Number 1000518 was reported as inaccurate.
E Howard Watch Co Boston USA, .S #1000518