Pocket Watch Database
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1088998
Access Date: June 07, 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: | 1088998 | ![]() |
Grade: | Series 7 | ![]() |
Model: | 1908 | ![]() |
Estimated Production Year: | 1911 | ![]() |
Run Quantity: | 3,000 | ![]() |
Grade/Model Total Production: | 51,850 | ![]() |
Variant Est. Production: | 46,850 (12S-M1908-17J-ONP) | ![]() |
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 | ![]() |
Database Version: | v50.869 | ![]() |
Advanced Metrics | ||
PWDB Absolute Rarity Index: Scoped for Grade/Size/Model/Configuration | 51.00 | ![]() |
PWDB Relative Rarity Index: Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration | 135.55 | ![]() |
Share of Production: Share within Manufacturer - Scoped for Grade/Size/Model/Configuration | 3.443% | ![]() |
Registry Population: | 3 (0.10%) | ![]() |
Production Metrics Tree: Grade Series 7
Target Profile: 12S-M1908-17J-ONP-A3PT
E. Howard Watch Co. (Keystone) Grade Series 7 (All Variations): 226,350 ETP | |||
12S: 226,350 100.00% 12s, Grade Series 7 |
|||
12S-M1908: 51,850 22.91% 12s, Grade Series 7, Model 1908 |
Other: 174,500
Other Models or Unclassified |
||
12S-M1908-17J: 51,850 22.91% 12s, Grade Series 7, Model 1908, 17 Jewels |
|||
12S-M1908-17J-ONP: 46,850 20.70% 12s, Grade Series 7, Model 1908, 17 Jewels, Openface/Pendant/Nickel |
Other: 5,000
Other Configs or Unclassified |
||
12S-M1908-17J-ONP-A3PT: 46,850 20.70% |
Population Registry for This Run
Image | Serial Number | Run Position | Primary Identification Method | Discovery Date | |
---|---|---|---|---|---|
1 |
![]() Image Credit: ebsrods |
1087507 | #507 | Collection | April 19, 2023 |
2 |
![]() Image Credit: rfbtxoh |
1087588 | #588 | Collection | January 04, 2021 |
3 |
![]() Image Credit: netmind |
1088998 | #1998 | Collection | May 25, 2023 |
Standard Deviation of Known Examples: 838.43 (Expected: 866.17, Δ27.74/0.92%) |
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.
ebsrods Supporter 78 · April 19, 2023
Serial Number 1087507 was reported as accurate.
cmdraven 3639 · January 17, 2022
Serial Number 1088870 was reported as accurate.
cmdraven 3639 · August 20, 2019
Serial Number 1087807 was reported as accurate.
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