Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1145536
Access Date: December 20, 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:
E. Howard Watch Co. (Keystone)
Grade: Series 9
Manufacturer: | E. Howard Watch Co. (Keystone) | |
Manufacturer Location: | Waltham, Massachusetts | |
Movement Serial Number: | 1145536 | |
Grade: | Series 9 | |
Model: | 1905 | |
Estimated Production Year: | 1910 | |
Run Quantity: | 500 | |
Grade/Model Run: | 13 of 14 | |
Grade/Model Total Production: | 15,610 | |
Variant Est. Production: | 1,000 (16S-M1905-17J-ONL) | |
Size: | 16s | |
Jewels: | 17j | |
Jewel Setting: | Gold Settings (Screw-Set) | |
Movement Configuration: | Openface | |
Movement Finish: | Nickel | |
Finish Pattern: | Checkerboard | |
Movement Setting: | Lever | |
Plate: | 3/4 Plate | |
Double Roller: | Yes | |
Regulator: | Reed | |
Hairspring: | Breguet | |
Standard Dial Type: | Double-Sunk | |
Adjusted: | 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 Pat'd '05 |
|
Case: | Various | |
Run ID: | 241.G13.16S162.161905M97.O159.L42.17J124 | |
Database Version: | v52.516 | |
Advanced Metrics | ||
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 34.62 | |
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 121.72 | |
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 2.199% | |
Registry Population: Scoped for This Run Only | 11 (2.20%) |
Production Metrics Tree: Grade Series 9
Target Profile: 16S-M1905-17J-ONL-A3PTI
E. Howard Watch Co. (Keystone) Grade Series 9 (All Variations): 15,610 ETP | |
16S: 15,610 100.00% 16s, Grade Series 9 |
|
16S-M1905: 15,610 100.00% 16s, Grade Series 9, Model 1905 |
|
16S-M1905-17J: 15,610 100.00% 16s, Grade Series 9, Model 1905, 17 Jewels |
|
16S-M1905-17J-ONL: 1,000 6.41% 16s, Grade Series 9, Model 1905, 17 Jewels, Openface/Lever/Nickel |
Other: 14,610
Other Configs or Unclassified |
16S-M1905-17J-ONL-A3PTI: 1,000 6.41% |
Population Registry for This Run
Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
---|---|---|---|---|---|
There are 11 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.
cjbrem Supporter 955 · December 14, 2024
Serial Number 1145988 was reported as accurate.
Anonymous · March 23, 2022
Serial Number 1145779 was reported as inaccurate.
serial number 1145779 is a pendent set. Also, the
gears seem to be nickel plated.
Anonymous · March 23, 2022
Serial Number 1145779 was reported as inaccurate.
Anonymous · October 15, 2019
Serial Number 1145800 was reported as inaccurate.
Anonymous · September 4, 2019
Serial Number 1145894 was reported as accurate.
ScottA 30 · June 20, 2019
Serial Number 1145900 was reported as accurate.
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