Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1178487
Access Date: January 30, 2023
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:
-Series7-12s.jpg)
E. Howard Watch Co. (Keystone)
Grade: Series 7
Manufacturer: | E. Howard Watch Co. (Keystone) | ![]() |
Manufacturer Location: | Waltham, Massachusetts | ![]() |
Movement Serial Number: | 1178487 | ![]() |
Grade: | Series 7 | ![]() |
Model: | 1912 | ![]() |
Estimated Production Year: | 1912 | ![]() |
Run Quantity: | 7,200 | ![]() |
Grade/Model 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 | ![]() |
Case: | Various | ![]() |
Registry Population: | 7 (0.10%) | ![]() |
Database Version: | v49.716 | ![]() |
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/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 | 1173317 | #517 | Collection | June 01, 2022 | |
2 | 1175003 | #2203 | Collection | March 23, 2017 | |
3 | 1175784 | #2984 | Collection | February 19, 2014 | |
4 | 1178351 | #5551 | Collection | January 26, 2020 | |
5 |
Image Credit: okiejohn |
1178487 | #5687 | Collection | February 02, 2020 |
6 |
![]() Image Credit: Mogman50 |
1179756 | #6956 | Collection | March 29, 2020 |
7 |
![]() Image Credit: abmimoso |
1179987 | #7187 | Collection | April 12, 2015 |
Standard Deviation of Known Examples: 2,555.37 (Expected: 2,078.61, Δ476.77/6.62%) |
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.
Anonymous · November 11, 2022
Serial Number 1172810 was reported as inaccurate.
mcopper 54 · July 22, 2021
Serial Number 1179246 was reported as accurate.
mcopper 54 · July 14, 2021
Serial Number 1179187 was reported as accurate.
ebsrods Supporter 61 · July 3, 2021
Serial Number 1179187 was reported as accurate.
2mnyboxers Supporter 331 · September 18, 2020
Serial Number 1178711 was reported as accurate.
bunnofnickle 67 · July 1, 2020
Serial Number 1172903 was reported as inaccurate.
Anonymous · March 7, 2020
Serial Number 1174264 was reported as accurate.
okiejohn 310 · February 6, 2020
Serial Number 1178487 was reported as accurate.
Harlton Supporter 98 · January 26, 2020
Serial Number 1178351 was reported as accurate.
Snapper Supporter 98 · January 5, 2020
Serial Number 1175413 was reported as accurate.
Anonymous · January 1, 2020
Serial Number 1176722 was reported as accurate.
Anonymous · July 27, 2019
Serial Number 1174047 was reported as accurate.
Anonymous · May 18, 2019
Serial Number 1175571 was reported as accurate.
Anonymous · May 5, 2019
Serial Number 1176145 was reported as accurate.
bubba70 543 · January 4, 2019
Serial Number 1176279 was reported as accurate.
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