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 Movement

E. Howard Watch Co. (Keystone)

Grade: Series 7

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1339039
Grade: Series 7
Variation: Arrow and Empty Circle
Model: 1912
Estimated Production Year: 1917
Run Quantity: 39,500
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

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Data Verification Reports

1320501
Verification Serial Map
1360000

Anonymous · October 24, 2020

Serial Number 1349706 was reported as accurate.

Dutchcollecter 13 · October 22, 2020

Serial Number 1354456 was reported as accurate.

Anonymous · October 16, 2020

Serial Number 1329355 was reported as accurate.

Anonymous · October 9, 2020

Serial Number 1354892 was reported as accurate.

Kurlander 18 · October 5, 2020

Serial Number 1342621 was reported as accurate.

Anonymous · September 11, 2020

Serial Number 1359692 was reported as accurate.

Farron44 2 · August 27, 2020

Serial Number 1344782 was reported as accurate.

Anonymous · August 19, 2020

Serial Number 1353239 was reported as accurate.

Anonymous · August 8, 2020

Serial Number 1353584 was reported as accurate.

Anonymous · August 1, 2020

Serial Number 1353239 was reported as accurate.

Anonymous · July 23, 2020

Serial Number 1355204 was reported as accurate.

Anonymous · July 10, 2020

Serial Number 1353239 was reported as accurate.

Anonymous · June 30, 2020

Serial Number 1340807 was reported as accurate.

Anonymous · June 26, 2020

Serial Number 1337024 was reported as accurate.

Anonymous · June 22, 2020

Serial Number 1357915 was reported as accurate.

Anonymous · June 12, 2020

Serial Number 1340583 was reported as accurate.

Anonymous · June 6, 2020

Serial Number 1350731 was reported as accurate.

Anonymous · May 26, 2020

Serial Number 1328425 was reported as accurate.

Anonymous · May 9, 2020

Serial Number 1358557 was reported as accurate.

Anonymous · April 10, 2020

Serial Number 1347794 was reported as accurate.

Anonymous · April 6, 2020

Serial Number 1339551 was reported as accurate.

Anonymous · March 25, 2020

Serial Number 1359068 was reported as accurate.

Anonymous · March 22, 2020

Serial Number 1341813 was reported as accurate.

Anonymous · March 21, 2020

Serial Number 1358557 was reported as accurate.

Anonymous · March 3, 2020

Serial Number 1344007 was reported as accurate.

Anonymous · March 3, 2020

Serial Number 1358605 was reported as accurate.

Anonymous · February 12, 2020

Serial Number 1334032 was reported as accurate.

Anonymous · February 2, 2020

Serial Number 1337345 was reported as accurate.

Anonymous · January 29, 2020

Serial Number 1349405 was reported as accurate.

Anonymous · December 23, 2019

Serial Number 1343345 was reported as accurate.

Anonymous · December 6, 2019

Serial Number 1358557 was reported as accurate.

Anonymous · December 5, 2019

Serial Number 1330592 was reported as accurate.

Anonymous · November 24, 2019

Serial Number 1346688 was reported as accurate.

Anonymous · November 24, 2019

Serial Number 1344652 was reported as accurate.

Anonymous · November 20, 2019

Serial Number 1330831 was reported as accurate.

Anonymous · November 5, 2019

Serial Number 1343109 was reported as accurate.

Rcardkidz 1706 · October 28, 2019

Serial Number 1335132 was reported as accurate.

Anonymous · October 7, 2019

Serial Number 1334630 was reported as accurate.

Anonymous · October 5, 2019

Serial Number 1356293 was reported as accurate.

Anonymous · October 3, 2019

Serial Number 1356293 was reported as accurate.

Anonymous · September 26, 2019

Serial Number 1335789 was reported as accurate.

Anonymous · September 21, 2019

Serial Number 1358557 was reported as accurate.

Anonymous · September 15, 2019

Serial Number 1348078 was reported as accurate.

Anonymous · September 13, 2019

Serial Number 1355946 was reported as accurate.

texnet 565 · September 10, 2019

Serial Number 1333322 was reported as accurate.

Anonymous · July 16, 2019

Serial Number 1335826 was reported as inaccurate.

Note: HOWARD in.... Waltham, Massachusetts !!!???
Curator Response: Yes - Waltham, Massachusetts. The Keystone Watch Case Company acquired the defunct U.S. Watch Company factory in Waltham, Massachusetts to manufacture watches using the E. Howard name.
Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · July 16, 2019

Serial Number 1335826 was reported as accurate.

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

Kintata 1 · June 22, 2019

Serial Number 1339279 was reported as accurate.

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

Anonymous · June 10, 2019

Serial Number 1329600 was reported as accurate.

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

Anonymous · June 3, 2019

Serial Number 1328477 was reported as accurate.

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

Anonymous · May 19, 2019

Serial Number 1325719 was reported as accurate.

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

Tiernanm 4 · May 9, 2019

Serial Number 1340518 was reported as accurate.

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

Anonymous · April 22, 2019

Serial Number 1354688 was reported as accurate.

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

Anonymous · April 2, 2019

Serial Number 1345495 was reported as accurate.

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

Anonymous · March 19, 2019

Serial Number 1331984 was reported as accurate.

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

Anonymous · March 10, 2019

Serial Number 1336010 was reported as accurate.

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

johnbjackson 20 · February 4, 2019

Serial Number 1337246 was reported as accurate.

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

Anonymous · January 22, 2019

Serial Number 1352646 was reported as accurate.

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

Anonymous · January 9, 2019

Serial Number 1337214 was reported as accurate.

Changes since this report was submitted:
Movement Configuration changed from Openface or Hunting to Openface
Plate changed from 3/4 to Bridge

Anonymous · December 31, 2018

Serial Number 1331855 was reported as accurate.

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

Anonymous · December 20, 2018

Serial Number 1353790 was reported as accurate.

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

Anonymous · December 15, 2018

Serial Number 1324873 was reported as accurate.

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

Sheetw 1 · December 14, 2018

Serial Number 1349405 was reported as accurate.

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

Anonymous · December 13, 2018

Serial Number 1354688 was reported as accurate.

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

golddude 10 · December 12, 2018

Serial Number 1352445 was reported as accurate.

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

Anonymous · October 26, 2018

Serial Number 1347153 was reported as accurate.

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

Anonymous · October 26, 2018

Serial Number 1347153 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 Movement