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: 1300431
Grade: Series 7
Model: 1912
Estimated Production Year: 1915
Run Quantity: 14,000
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: 16 (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 1290522 #522 Collection October 06, 2021
2 1291850 #1850 Collection July 09, 2016
3 1291896 #1896 Collection August 26, 2022
4 1292239 #2239 Collection July 21, 2015
5 1293207 #3207 Collection September 21, 2021
6 1293365 #3365 Collection November 13, 2022
7 1294602 #4602 Collection August 31, 2019
8 1296534 #6534 Collection September 28, 2022
9
Image Credit: lorijean56
1298580 #8580 Collection May 02, 2016
10 1298780 #8780 Collection December 30, 2015
11 1299102 #9102 Collection August 19, 2018
12 1300123 #10123 Collection July 20, 2019
13
Image Credit: JDPorter81
1300431 #10431 Collection May 03, 2021
14 1300650 #10650 Collection June 05, 2019
15
Image Credit: countessj
1300728 #10728 Collection October 13, 2022
16
Image Credit: texnet
1302623 #12623 Collection July 23, 2020
Standard Deviation of Known Examples: 3,986.28 (Expected: 4,041.60, Δ55.32/0.40%)

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.


YankeeLover24 1 · October 28, 2022

Serial Number 1292842 was reported as accurate.

Anonymous · September 21, 2022

Serial Number 1300405 was reported as accurate.

Anonymous · August 23, 2022

Serial Number 1290726 was reported as accurate.

Anonymous · May 1, 2022

Serial Number 1300001 was reported as accurate.

mcopper 54 · April 8, 2022

Serial Number 1297817 was reported as accurate.

Anonymous · December 28, 2021

Serial Number 1298924 was reported as accurate.

Anonymous · November 17, 2021

Serial Number 1301235 was reported as accurate.

Anonymous · September 16, 2021

Serial Number 1295730 was reported as accurate.

Anonymous · July 9, 2021

Serial Number 1293774 was reported as accurate.

Anonymous · May 23, 2021

Serial Number 1290624 was reported as accurate.

Anonymous · May 2, 2021

Serial Number 1301022 was reported as accurate.

petersas 14 · April 13, 2021

Serial Number 1301483 was reported as accurate.

Anonymous · April 1, 2021

Serial Number 1302179 was reported as accurate.

Anonymous · January 21, 2021

Serial Number 1291559 was reported as accurate.

bananajoe 4 · December 22, 2020

Serial Number 1293885 was reported as accurate.

Anonymous · November 7, 2020

Serial Number 1292425 was reported as accurate.

Anonymous · November 4, 2020

Serial Number 1297703 was reported as inaccurate.

Note: Size 14s
Curator Response: Thanks for the report. These watches were advertised and sold as 12-Size even though the dial plate measures closer to 14-Size.

Anonymous · September 28, 2020

Serial Number 1296140 was reported as accurate.

Anonymous · September 19, 2020

Serial Number 1302955 was reported as accurate.

Bostonwatch 59 · September 4, 2020

Serial Number 1292159 was reported as accurate.

MoatsJustin1 2533 · August 15, 2020

Serial Number 1301658 was reported as accurate.

texnet Supporter 684 · July 23, 2020

Serial Number 1302623 was reported as accurate.

Anonymous · July 10, 2020

Serial Number 1293258 was reported as accurate.

Anonymous · July 9, 2020

Serial Number 1297375 was reported as accurate.

Anonymous · May 24, 2020

Serial Number 1296736 was reported as accurate.

jmfoss03 33 · May 9, 2020

Serial Number 1292676 was reported as accurate.

windupthings 24 · April 10, 2020

Serial Number 1302623 was reported as accurate.

Anonymous · April 1, 2020

Serial Number 1293885 was reported as accurate.

Anonymous · March 6, 2020

Serial Number 1302623 was reported as accurate.

Anonymous · March 5, 2020

Serial Number 1300797 was reported as accurate.

Anonymous · March 1, 2020

Serial Number 1294979 was reported as accurate.

Anonymous · December 24, 2019

Serial Number 1295562 was reported as accurate.

Anonymous · August 27, 2019

Serial Number 1293653 was reported as accurate.

Anonymous · August 21, 2019

Serial Number 1293408 was reported as accurate.

Anonymous · August 8, 2019

Serial Number 1301235 was reported as accurate.

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

texnet Supporter 684 · July 20, 2019

Serial Number 1300123 was reported as accurate.

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

Kevin H 84 · June 15, 2019

Serial Number 1290391 was reported as accurate.

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

AlbuquerqueCoins Supporter 4 · June 15, 2019

Serial Number 1296156 was reported as accurate.

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

Anonymous · May 5, 2019

Serial Number 1299991 was reported as accurate.

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

Anonymous · February 7, 2019

Serial Number 1297117 was reported as accurate.

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

Anonymous · January 29, 2019

Serial Number 1296876 was reported as accurate.

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

Anonymous · November 13, 2018

Serial Number 1298436 was reported as accurate.

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