Pocket Watch Database
Access Date: January 30, 2023
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 7
|Manufacturer:||E. Howard Watch Co. (Keystone)|
|Manufacturer Location:||Waltham, Massachusetts|
|Movement Serial Number:||1231521|
|Estimated Production Year:||1913|
|Grade/Model Total Production:||172,700|
|Adjusted # of Positions:||3|
|Adjusted to Temperature:||Yes|
|Registry Population:||2 (0.03%)|
Production Metrics Tree: Grade Series 7
Target Profile: 12S-M1912-17J-ONP-A3PT
|E. Howard Watch Co. (Keystone) Grade Series 7 (All Variations): 224,550 ETP|
|12S: 224,550 100.00%
12s, Grade Series 7
|12S-M1912: 172,700 76.91%
12s, Grade Series 7, Model 1912
Other Models or Unclassified
|12S-M1912-17J: 172,700 76.91%
12s, Grade Series 7, Model 1912, 17 Jewels
|12S-M1912-17J-ONP: 172,700 76.91%
12s, Grade Series 7, Model 1912, 17 Jewels, Openface/Pendant/Nickel
|12S-M1912-17J-ONP-A3PT: 172,700 76.91%|
Population Registry for This Run
|Image||Serial Number||Run Position||Primary Identification Method||Discovery Date|
Image Credit: Bostonjoe
|1231521||#521||Collection||September 16, 2020|
Image Credit: smurphy
|1235033||#4033||Collection||March 19, 2022|
|Standard Deviation of Known Examples: 2,483.36 (Expected: 1,732.20, Δ751.16/12.52%)|
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.
Bostonjoe Top Contributor Supporter 185 · December 17, 2021
Serial Number 1231521 was reported as accurate.
Automatic 254 · August 12, 2020
Serial Number 1236473 was reported as accurate.
Anonymous · June 19, 2020
Serial Number 1234762 was reported as accurate.
Anonymous · February 28, 2020
Serial Number 1235537 was reported as inaccurate.
Anonymous · February 17, 2020
Serial Number 1235537 was reported as accurate.
Nhkohn 1 · November 9, 2019
Serial Number 1231100 was reported as accurate.
Anonymous · July 3, 2019
Serial Number 1232962 was reported as accurate.
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