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: 1226165
Grade: Series 7
Model: 1912
Estimated Production Year: 1913
Run Quantity: 10,000
Grade/Model Total Production: 172,700
Size: 12s
Jewels: 17j
Movement Configuration: Openface or Hunting
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: 11 (0.11%)
Database Version: v49.708

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 or Hunting/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 1221577 #1577 Collection February 16, 2018
2
Image Credit: sean813
1221676 #1676 Collection February 08, 2022
3 1222189 #2189 Collection February 18, 2014
4 1223733 #3733 Collection July 16, 2020
5 1224189 #4189 Collection September 28, 2022
6
Image Credit: mbellich
1226165 #6165 Collection September 26, 2020
7 1226203 #6203 Collection June 14, 2019
8
Image Credit: Grizzy
1226770 #6770 Collection March 22, 2019
9 1227067 #7067 Collection April 24, 2016
10 1227171 #7171 Collection January 05, 2020
11 1227234 #7234 Collection June 11, 2021
Standard Deviation of Known Examples: 2,296.71 (Expected: 2,886.90, Δ590.19/5.90%)

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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.


mbellich Supporter 24 · November 4, 2022

Serial Number 1226165 was reported as accurate.

Anonymous · July 21, 2022

Serial Number 1221870 was reported as accurate.

Anonymous · April 20, 2022

Serial Number 1224225 was reported as accurate.

Anonymous · March 27, 2022

Serial Number 1225525 was reported as accurate.

Anonymous · October 7, 2021

Serial Number 1222929 was reported as accurate.

Anonymous · September 6, 2021

Serial Number 1220845 was reported as accurate.

Anonymous · June 4, 2021

Serial Number 1229662 was reported as accurate.

Anonymous · May 31, 2021

Serial Number 1227564 was reported as accurate.

Anonymous · February 21, 2021

Serial Number 1228480 was reported as accurate.

Anonymous · December 31, 2020

Serial Number 1229937 was reported as accurate.

lee571 Supporter 68 · December 14, 2020

Serial Number 1227676 was reported as accurate.

lee571 Supporter 68 · December 14, 2020

Serial Number 1227676 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · August 14, 2020

Serial Number 1227395 was reported as accurate.

Rcardkidz 2782 · May 5, 2020

Serial Number 1227104 was reported as accurate.

Anonymous · April 18, 2020

Serial Number 1220322 was reported as accurate.

hudnic Supporter 78 · March 6, 2020

Serial Number 1229426 was reported as accurate.

Anonymous · February 20, 2020

Serial Number 1227932 was reported as accurate.

Anonymous · February 2, 2020

Serial Number 1227377 was reported as accurate.

Anonymous · January 20, 2020

Serial Number 1220738 was reported as accurate.

Anonymous · November 5, 2019

Serial Number 1227564 was reported as inaccurate.

Note: measured out to 14s

Anonymous · September 7, 2019

Serial Number 1228236 was reported as accurate.

Anonymous · June 26, 2019

Serial Number 1222929 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · June 24, 2019

Serial Number 1225787 was reported as inaccurate.

No further details were submitted with the report.
Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · June 23, 2019

Serial Number 1223560 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · May 23, 2019

Serial Number 1223029 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · April 19, 2019

Serial Number 1220056 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · March 16, 2019

Serial Number 1224070 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

bubba70 543 · March 10, 2019

Serial Number 1222585 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · February 14, 2019

Serial Number 1221508 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