Pocket Watch Database

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 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 7

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1235033
Grade: Series 7
Model: 1912
Estimated Production Year: 1913
Run Quantity: 6,000
Grade/Model Total Production: 172,700
Size: 12s
Jewels: 17j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Pendant
Plate: Bridge Plate
Double Roller: Yes
Hairspring: Breguet
Adjusted: Yes
Adjusted # of Positions: 3
Adjusted to Temperature: Yes
Railroad Grade: No
Case: Various
Registry Population: 2 (0.03%)
Database Version: v49.712

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: 51,850
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
1
Image Credit: Bostonjoe
1231521 #521 Collection September 16, 2020
2
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%)

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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 · August 15, 2022

Serial Number 1234239 was reported as accurate.

Bostonjoe Top Contributor Supporter 185 · December 17, 2021

Serial Number 1231521 was reported as accurate.

Anonymous · May 29, 2021

Serial Number 1236010 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.

Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · April 7, 2020

Serial Number 1235537 was reported as accurate.

Anonymous · February 28, 2020

Serial Number 1235537 was reported as inaccurate.

Note: PAT’D’12
17 jewels
TEMPERATURE
3 POS.
Curator Response: Thanks for the report. The database has been updated accordingly.
Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · February 17, 2020

Serial Number 1235537 was reported as accurate.

Changes since this report was submitted:
Grade changed from ? to Series 7

Nhkohn 1 · November 9, 2019

Serial Number 1231100 was reported as accurate.

Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · August 12, 2019

Serial Number 1236390 was reported as accurate.

Anonymous · July 3, 2019

Serial Number 1232962 was reported as accurate.

Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · June 2, 2019

Serial Number 1236700 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge
E. Howard Watch Co. (Keystone) Grade Series 7 Pocket Watch