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 12 Pocket Watch Movement

E. Howard Watch Co. (Keystone)

Grade: Series 12

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 25772
Grade: Series 12
Model: 1921
Estimated Production Year: 1921
Run Quantity: 26,000
Total Production: 47,450
Size: 10s
Jewels: 17j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Pendant
Plate: Bridge Plate
Hairspring: Breguet
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 3
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: No
Database Version: v46.977

Help Us Help Others By Improving the Database:

Does this information describe your movement accurately?

Data Verification Reports

12001
Verification Serial Map
38000

CLOCKWORKBRIAN72 32 · October 21, 2021

Serial Number 32584 was reported as accurate.

MoatsJustin1 1750 · September 25, 2021

Serial Number 31267 was reported as accurate.

Anonymous · September 22, 2021

Serial Number 14071 was reported as accurate.

Anonymous · August 24, 2021

Serial Number 37611 was reported as accurate.

Anonymous · August 12, 2021

Serial Number 22846 was reported as accurate.

Anonymous · July 5, 2021

Serial Number 13492 was reported as accurate.

Anonymous · June 22, 2021

Serial Number 22544 was reported as inaccurate.

Note: Hello All, Please see:
eBay item number:224500394955
E. Howard mvmt: SN: 22544, 44.5mm, KWKS, Series
III. I do not own this so; the other details
cannot be verified. The database info does not
seem close to a match. Thank you. Steve Burns
Curator Response: Thanks for the report. The watch listed on eBay is a product of E. Howard & Co. rather than the E. Howard Watch Co. owned by Keystone. Here is the correct lookup page: https://pocketwatchdatabase.com/search/result/e.-howard-co/22544

Anonymous · May 21, 2021

Serial Number 31258 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · May 15, 2021

Serial Number 12435 was reported as accurate.

cowdoc6881 1 · May 14, 2021

Serial Number 27813 was reported as accurate.

cowdoc6881 1 · May 14, 2021

Serial Number 27813 was reported as accurate.

Anonymous · March 20, 2021

Serial Number 19919 was reported as accurate.

Anonymous · February 25, 2021

Serial Number 18791 was reported as accurate.

Anonymous · February 23, 2021

Serial Number 16373 was reported as accurate.

Anonymous · February 21, 2021

Serial Number 16079 was reported as accurate.

MadBunny 33 · February 21, 2021

Serial Number 15279 was reported as accurate.

Anonymous · February 18, 2021

Serial Number 18836 was reported as accurate.

Mondomike 15 · February 6, 2021

Serial Number 21295 was reported as accurate.

madigan3006 1 · January 3, 2021

Serial Number 30869 was reported as accurate.

okiejohn 272 · December 3, 2020

Serial Number 26030 was reported as accurate.

Anonymous · November 21, 2020

Serial Number 32275 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · November 18, 2020

Serial Number 16881 was reported as accurate.

Anonymous · October 26, 2020

Serial Number 22087 was reported as accurate.

Anonymous · October 23, 2020

Serial Number 22087 was reported as accurate.

Anonymous · October 18, 2020

Serial Number 21085 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · October 18, 2020

Serial Number 22067 was reported as accurate.

Anonymous · August 23, 2020

Serial Number 12247 was reported as accurate.

Anonymous · August 1, 2020

Serial Number 29882 was reported as accurate.

Anonymous · July 19, 2020

Serial Number 29882 was reported as accurate.

Anonymous · July 15, 2020

Serial Number 15476 was reported as accurate.

Anonymous · July 1, 2020

Serial Number 21518 was reported as accurate.

Anonymous · June 15, 2020

Serial Number 28340 was reported as accurate.

Anonymous · June 9, 2020

Serial Number 22935 was reported as accurate.

Anonymous · May 31, 2020

Serial Number 18852 was reported as accurate.

cmdraven 3159 · May 28, 2020

Serial Number 20891 was reported as accurate.

Anonymous · April 5, 2020

Serial Number 25981 was reported as accurate.

okiejohn 272 · March 13, 2020

Serial Number 15357 was reported as accurate.

Anonymous · March 9, 2020

Serial Number 14308 was reported as accurate.

Anonymous · March 4, 2020

Serial Number 22219 was reported as accurate.

Anonymous · February 26, 2020

Serial Number 14988 was reported as accurate.

Andrew9000 78 · February 21, 2020

Serial Number 33276 was reported as accurate.

Anonymous · February 17, 2020

Serial Number 21518 was reported as accurate.

Anonymous · January 18, 2020

Serial Number 23671 was reported as accurate.

mickroid 49 · January 1, 2020

Serial Number 25462 was reported as accurate.

Anonymous · January 1, 2020

Serial Number 18903 was reported as accurate.

Andrew9000 78 · May 7, 2019

Serial Number 20987 was reported as accurate.

Andrew9000 78 · May 7, 2019

Serial Number 20987 was reported as accurate.

Anonymous · April 24, 2019

Serial Number 19017 was reported as accurate.

Anonymous · April 16, 2019

Serial Number 17522 was reported as accurate.

Anonymous · March 11, 2019

Serial Number 27839 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · March 10, 2019

Serial Number 37175 was reported as accurate.

Anonymous · February 25, 2019

Serial Number 17156 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 12 Pocket Watch Movement