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: 1213095
Grade: Series 7
Model: 1912
Estimated Production Year: 1913
Run Quantity: 12,000
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: 12 (0.10%)
Database Version: v49.391

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 1205449 #449 Collection March 22, 2022
2 1206779 #1779 Collection January 23, 2018
3 1208022 #3022 Collection November 22, 2017
4 1208292 #3292 Collection December 09, 2015
5 1210427 #5427 Collection March 16, 2014
6 1211267 #6267 Collection June 20, 2017
7 1211528 #6528 Collection November 27, 2020
8 1213095 #8095 Collection September 17, 2015
9 1213150 #8150 Collection August 19, 2018
10 1213174 #8174 Collection August 11, 2018
11 1214325 #9325 Collection December 24, 2017
12 1216243 #11243 Collection May 17, 2018
Standard Deviation of Known Examples: 3,272.31 (Expected: 3,464.25, Δ191.94/1.60%)

Help Us Help Others By Improving the Database:

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Data Verification Reports

1205001
Verification Serial Map
1217000

Anonymous · December 1, 2022

Serial Number 1208755 was reported as accurate.

Anonymous · June 12, 2022

Serial Number 1209690 was reported as accurate.

Anonymous · March 3, 2022

Serial Number 1214711 was reported as accurate.

Anonymous · March 2, 2022

Serial Number 1214711 was reported as accurate.

Anonymous · February 21, 2022

Serial Number 1213660 was reported as accurate.

Automatic 254 · June 27, 2021

Serial Number 1208900 was reported as accurate.

Anonymous · February 7, 2021

Serial Number 1213465 was reported as accurate.

Bostonwatch 59 · September 4, 2020

Serial Number 1213707 was reported as accurate.

Bostonwatch 59 · September 3, 2020

Serial Number 1213707 was reported as accurate.

Anonymous · August 24, 2020

Serial Number 1205029 was reported as accurate.

Anonymous · June 4, 2020

Serial Number 1205693 was reported as accurate.

Anonymous · May 12, 2020

Serial Number 1211055 was reported as accurate.

Anonymous · April 13, 2020

Serial Number 1215383 was reported as accurate.

Anonymous · April 8, 2020

Serial Number 1206348 was reported as accurate.

Anonymous · April 7, 2020

Serial Number 1207411 was reported as accurate.

Anonymous · March 30, 2020

Serial Number 1208460 was reported as accurate.

Anonymous · February 23, 2020

Serial Number 1212147 was reported as accurate.

Anonymous · January 10, 2020

Serial Number 1215962 was reported as accurate.

Anonymous · October 15, 2019

Serial Number 1216608 was reported as accurate.

Anonymous · September 27, 2019

Serial Number 1209566 was reported as accurate.

alexkedziekoins 22 · September 24, 2019

Serial Number 1211524 was reported as accurate.

Anonymous · September 23, 2019

Serial Number 1214908 was reported as accurate.

Anonymous · August 23, 2019

Serial Number 1208745 was reported as accurate.

Anonymous · May 17, 2019

Serial Number 1212409 was reported as accurate.

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

Anonymous · April 23, 2019

Serial Number 1206896 was reported as accurate.

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

curtis 42 · February 14, 2019

Serial Number 1211624 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