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Information Provided by PocketWatchDatabase.com:
https://pocketwatchdatabase.com/search/result/e.-howard-watch-co.-keystone/1120871
Access Date: April 27, 2024

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 8 Pocket Watch
E. Howard Watch Co. (Keystone)

Grade: Series 8

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1120871
Grade: Series 8
Model: 1908
Estimated Production Year: 1912
Run Quantity: 500
Grade/Model Run: 16 of 16
Grade/Model Total Production: 4,950
Variant Est. Production: 885 (12S-M1908-23J-ONP)
Size: 12s
Jewels: 23j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Pendant
Plate: Bridge Plate
Double Roller: Yes
Hairspring: Breguet
Adjusted: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Railroad Grade: No
Case: Various
Run ID: 218.G17.12S43.121908M42.O132.P148.23J26
Database Version: v52.245
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration		 13.09
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration		 43.44
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration		 0.842%
Registry Population: 2 (0.40%)
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Production Metrics Tree: Grade Series 8

Target Profile: 12S-M1908-23J-ONP-A5PT

E. Howard Watch Co. (Keystone) Grade Series 8 (All Variations): 13,400 ETP
12S: 13,400 100.00%
12s, Grade Series 8
12S-M1908: 4,950 36.94%
12s, Grade Series 8, Model 1908		 Other: 8,450
Other Models or Unclassified
12S-M1908-23J: 1,385 10.34%
12s, Grade Series 8, Model 1908, 23 Jewels		 Other: 3,565
Other Jewels or Unclassified
12S-M1908-23J-ONP: 885 6.60%
12s, Grade Series 8, Model 1908, 23 Jewels, Openface/Pendant/Nickel 		Other: 500
Other Configs or Unclassified
12S-M1908-23J-ONP-A5PT: 885 6.60%

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
There are 2 watches in the population registry for this run with 1 image.
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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.

cajunsteve 2 · November 13, 2023

Serial Number 1120867 was reported as inaccurate.

Note: I would add that this serial number has the Ruby
Banking pins. I'm not sure if other model 8's had
a jeweled mainspring barrel or had Ruby banking
pins to make 23 jewels. Movement also marled "Five
Position & Temperature, Special Adjustment" on
bottom plate.

Anonymous · March 29, 2023

Serial Number 1120871 was reported as inaccurate.

Note: My movement is marked 23J not 21J. I will upload
photo to my collection.
Changes since this report was submitted:
Jewels changed from 21j to 23j

Anonymous · March 16, 2023

Serial Number 1120933 was reported as inaccurate.

No further details were submitted with the report.
Changes since this report was submitted:
Jewels changed from 21j to 23j

Anonymous · October 28, 2022

Serial Number 1120852 was reported as accurate.

Changes since this report was submitted:
Jewels changed from 21j to 23j

bunnofnickle 67 · August 8, 2020

Serial Number 1120588 was reported as accurate.

Anonymous · August 4, 2020

Serial Number 1120588 was reported as inaccurate.

Note: My example is 23j.
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Jewels changed from 21j to 23j

Anonymous · September 23, 2018

Serial Number 1120962 was reported as inaccurate.

Note: the watch i have is 23 jewel and 14 k gold
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection so we can take a closer look.
Changes since this report was submitted:
Jewels changed from 21j to 23j
E. Howard Watch Co. (Keystone) Grade Series 8 Pocket Watch