Pocket Watch Database

There is an alternative result available for this serial number. View the result for E. Howard & Co. movement #12790.

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

E. Howard Watch Co. (Keystone)

Grade: Series 12

Manufacturer: E. Howard Watch Co. (Keystone) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 12790 Question Mark
Grade: Series 12 Question Mark
Model: 1921 Question Mark
Estimated Production Year: 1921 Question Mark
Run Quantity: 26,000 Question Mark
Grade/Model Run: 1 of 5 Question Mark
Grade/Model Total Production: 47,450 Question Mark
Size: 10s Question Mark
Jewels: 17j Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Finish Pattern: Standard Stripe Question Mark
Movement Setting: Pendant Question Mark
Plate: Bridge Plate Question Mark
Regulator: Plain Question Mark
Hairspring: Breguet Question Mark
Adjusted: Yes Question Mark
Adjusted to Position: Yes Question Mark
Adjusted # of Positions: 3 Question Mark
Adjusted to Temperature: Yes Question Mark
Adjusted to Isochronism: Yes Question Mark
Railroad Grade: No Question Mark
Movement Markings: E. Howard Watch Co.
Boston, U.S.A.
[Empty Circle in Arrow]
Pat'd. '21
[Some Additionally Marked "17J"]
Case: Various Question Mark
Run ID: 8.G1.10S7.101921M7.O8.P8.17J1 Question Mark
Database Version: v52.504 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
142.86 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
502.54 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
9.075% Question Mark
Registry Population:
Scoped for This Run Only
41 (0.16%) Question Mark

Help Us Help Others By Improving the Database:

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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.


Anonymous · December 6, 2024

Serial Number 19545 was reported as accurate.

Anonymous · November 18, 2024

Serial Number 32370 was reported as accurate.

Anonymous · November 15, 2024

Serial Number 32370 was reported as accurate.

Anonymous · September 14, 2024

Serial Number 34457 was reported as inaccurate.

No further details were submitted with the report.

cjbrem Supporter 933 · August 27, 2024

Serial Number 18368 was reported as accurate.

Anonymous · April 24, 2024

Serial Number 13700 was reported as accurate.

Anonymous · February 10, 2024

Serial Number 25445 was reported as accurate.

Anonymous · August 28, 2023

Serial Number 21912 was reported as accurate.

cbzimm Supporter 469 · April 30, 2023

Serial Number 29984 was reported as accurate.

Anonymous · March 16, 2023

Serial Number 34317 was reported as accurate.

ralph1 113 · November 28, 2022

Serial Number 21524 was reported as accurate.

Anonymous · September 2, 2022

Serial Number 25162 was reported as inaccurate.

Note: 21 jewels for this serial number
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.

Anonymous · August 14, 2022

Serial Number 26689 was reported as accurate.

Anonymous · May 14, 2022

Serial Number 37767 was reported as accurate.

2251lyle 78 · April 1, 2022

Serial Number 13677 was reported as accurate.

Anonymous · February 25, 2022

Serial Number 18485 was reported as accurate.

mcopper 55 · February 19, 2022

Serial Number 28797 was reported as accurate.

2mnyboxers Supporter 408 · February 14, 2022

Serial Number 28301 was reported as accurate.

Anonymous · January 9, 2022

Serial Number 18609 was reported as accurate.

Anonymous · January 8, 2022

Serial Number 12813 was reported as accurate.

Anonymous · December 25, 2021

Serial Number 34199 was reported as accurate.

Pinko2 69 · December 21, 2021

Serial Number 13677 was reported as accurate.

Anonymous · December 15, 2021

Serial Number 27260 was reported as accurate.

Anonymous · December 13, 2021

Serial Number 25604 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · November 28, 2021

Serial Number 15275 was reported as accurate.

Anonymous · November 25, 2021

Serial Number 28834 was reported as accurate.

Anonymous · November 22, 2021

Serial Number 13677 was reported as accurate.

MoatsJustin1 top-contributor 5269 · October 28, 2021

Serial Number 12966 was reported as accurate.

CLOCKWORKBRIAN72 50 · October 21, 2021

Serial Number 32584 was reported as accurate.

MoatsJustin1 top-contributor 5269 · 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 37 · 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 392 · 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.

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