Anonymous · May 21, 2026
Serial Number 16135 was reported as accurate.
Information Provided by PocketWatchDatabase.com:
https://new.pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/25772
https://new.pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/25772
Access Date: June 3, 2026
From the American Horology Archive:
E. Howard Watch Co. (Keystone)
Grade: Series 12
This serial number overlaps another lookup range. You may also want to review the result for E. Howard & Co..
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.
As a result, the information may contain inaccuracies. Please let us know if you have details that can improve the database.
| Manufacturer: | E. Howard Watch Co. (Keystone) | ? |
| Manufacturer Location: | Waltham, Massachusetts | ? |
| Movement Serial Number: | 25772 | ? |
| Grade: | Series 12 | ? |
| Model: | 1921 | ? |
| Estimated Production Year: | 1923 | ? |
| Run Quantity: | 26,000 | ? |
| Grade/Model Run: | 1 of 5 | ? |
| Grade/Model Total Production: | 47,450 | ? |
| Size: | 10s | ? |
| Jewels: | 17j | ? |
| Movement Configuration: | Openface | ? |
| Movement Finish: | Nickel | ? |
| Finish Pattern: | Standard Stripe | ? |
| Movement Setting: | Pendant | ? |
| Plate: | Bridge Plate | ? |
| Regulator: | Plain | ? |
| Hairspring: | Breguet | ? |
| Adjusted: | Yes | ? |
| Adjusted to Position: | Yes | ? |
| Adjusted # of Positions: | 3 | ? |
| Adjusted to Temperature: | Yes | ? |
| Adjusted to Isochronism: | Yes | ? |
| Railroad Grade: | No | ? |
| Movement Markings: | E. Howard Watch Co. Boston, U.S.A. [Empty Circle in Arrow] Pat'd. '21 [Some Additionally Marked "17J"] | ? |
| Case: | Various | ? |
| Run ID: | 8.G1.10S7.101921M7.O8.P8.17J1 | ? |
| Database Version: | v52.978 | ? |
| Advanced Metrics | ||
| Members Only Data. Login or create a free account to unlock. | ||
| Registry Population: Scoped for This Run Only: | 48 (0.18%) | ? |
Continue Your Research
Population Registry for This Run
Total Known Population In Run 48/26,000
Percentage of Total Run 0.18%
|
There are 48 watches in the population registry for this run with 16 images.
Create a FREE account or login to view the population registry and add your watch to the registry. |
Improve the Database
Why Might This Information Be Incorrect?
Does this information describe your movement accurately?
Verification reports help confirm surviving examples and flag data that needs further research.
Verification Reports for this Run
The following reports have been submitted by members in reference to this production run. These reports help verify data and track inaccuracies that require further research.
Timechane · April 5, 2026
Serial Number 19078 was reported as inaccurate.
No further details were submitted with the report.
Anonymous · January 28, 2026
Serial Number 19898 was reported as accurate.
Anonymous · January 28, 2026
Serial Number 19898 was reported as accurate.
cmdraven · January 9, 2026
Serial Number 29275 was reported as accurate.
MoatsJustin1 · May 19, 2025
Serial Number 22362 was reported as accurate.
Anonymous · May 4, 2025
Serial Number 16796 was reported as accurate.
Anonymous · April 4, 2025
Serial Number 20684 was reported as accurate.
Anonymous · March 17, 2025
Serial Number 25696 was reported as accurate.
dajack325 · February 15, 2025
Serial Number 26447 was reported as accurate.
Anonymous · February 15, 2025
Serial Number 26447 was reported as accurate.
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 · 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 · April 30, 2023
Serial Number 29984 was reported as accurate.
Anonymous · March 16, 2023
Serial Number 34317 was reported as accurate.
ralph1 · 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 · April 1, 2022
Serial Number 13677 was reported as accurate.
Anonymous · February 25, 2022
Serial Number 18485 was reported as accurate.
mcopper · February 19, 2022
Serial Number 28797 was reported as accurate.
2mnyboxers · 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 · 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 · October 28, 2021
Serial Number 12966 was reported as accurate.
CLOCKWORKBRIAN72 · October 21, 2021
Serial Number 32584 was reported as accurate.
MoatsJustin1 · 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
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 · May 14, 2021
Serial Number 27813 was reported as accurate.
cowdoc6881 · 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 · February 21, 2021
Serial Number 15279 was reported as accurate.
Anonymous · February 18, 2021
Serial Number 18836 was reported as accurate.
Mondomike · February 6, 2021
Serial Number 21295 was reported as accurate.
madigan3006 · January 3, 2021
Serial Number 30869 was reported as accurate.
okiejohn · 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 · May 28, 2020
Serial Number 20891 was reported as accurate.
Anonymous · April 5, 2020
Serial Number 25981 was reported as accurate.
okiejohn · 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 · 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 · January 1, 2020
Serial Number 25462 was reported as accurate.
Anonymous · January 1, 2020
Serial Number 18903 was reported as accurate.
Andrew9000 · May 7, 2019
Serial Number 20987 was reported as accurate.
Andrew9000 · 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.