Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/912966
Access Date: January 31, 2025
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:
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E. Howard Watch Co. (Keystone)
Grade: Series 3
| Manufacturer: | E. Howard Watch Co. (Keystone) |  |
| Manufacturer Location: | Waltham, Massachusetts | |
| Movement Serial Number: | 912966 | |
| Grade: | Series 3 | |
| Model: | 1905 | |
| Estimated Production Year: | 1906 | |
| Run Quantity: | 2,000 | |
| Grade/Model Run: | 17 of 39 | |
| Grade/Model Total Production: | 49,390 | |
| Variant Est. Production: | 26,840 (16S-M1905-17J-HNP) | |
| Size: | 16s | |
| Jewels: | 17j | |
| Jewel Material: | Ruby & Sapphire | |
| Jewel Setting: | Gold Settings (Screw-Set) | |
| Movement Configuration: | Hunting | |
| Movement Finish: | Nickel | |
| Finish Pattern: | Circular | |
| Movement Setting: | Pendant | |
| Plate: | 3/4 Plate | |
| Regulator: | Reed | |
| Hairspring: | Breguet | |
| Pallet Jewel Material: | Sapphire | |
| Standard Dial Type: | Single-Sunk | |
| Adjusted: | Yes | |
| Adjusted to Position: | Yes | |
| Adjusted # of Positions: | 3 | |
| Adjusted to Temperature: | Yes | |
| Adjusted to Isochronism: | Yes | |
| Dial Feet Locations: | 10.7, 24.3, 48.9 | |
| U.S. Patents: | 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667 | |
| Movement Markings: | E. Howard Watch Co. Boston U.S.A. Adjusted 17 Jewels |
|
| Case: | Various | |
| Run ID: | 48.G17.16S24.161905M23.H11.P40.17J27 | |
| Database Version: | v52.584 | |
| Advanced Metrics | ||
| PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 80.81 | |
| PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 284.22 | |
| Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 5.132% | |
| Registry Population: Scoped for This Run Only | 39 (1.95%) | |
Production Metrics Tree: Grade Series 3
Target Profile: 16S-M1905-17J-HNP-A3PTI
| E. Howard Watch Co. (Keystone) Grade Series 3 (All Variations): 49,390 ETP | |
| 16S: 49,390 100.00% 16s, Grade Series 3 |
|
| 16S-M1905: 49,390 100.00% 16s, Grade Series 3, Model 1905 |
|
| 16S-M1905-17J: 49,390 100.00% 16s, Grade Series 3, Model 1905, 17 Jewels |
|
| 16S-M1905-17J-HNP: 26,840 54.34% 16s, Grade Series 3, Model 1905, 17 Jewels, Hunting/Pendant/Nickel |
Other: 22,550
Other Configs or Unclassified |
| 16S-M1905-17J-HNP-A3PTI: 26,840 54.34% | |
Population Registry for This Run
| Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
|---|---|---|---|---|---|
|
There are 39 watches in the population registry for this run with 1 image.
|
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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.
Rcardkidz 4162 · May 12, 2024
Serial Number 911122 was reported as accurate.
Anonymous · February 5, 2023
Serial Number 912990 was reported as accurate.
Anonymous · January 13, 2021
Serial Number 912926 was reported as accurate.
Anonymous · March 6, 2020
Serial Number 912471 was reported as accurate.
backintime 16 · December 22, 2019
Serial Number 912125 was reported as accurate.
Anonymous · August 5, 2019
Serial Number 912389 was reported as accurate.
Anonymous · September 28, 2018
Serial Number 911271 was reported as accurate.
