Pocket Watch Database

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 10 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 10

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1153077
Grade: Series 10
Variation: Ser. 10
Model: 1907
Estimated Production Year: 1912
Run Quantity: 800
Grade/Model Run: 9 of 23
Grade/Model Total Production: 17,800
Variant Est. Production: 2,250 (16S-M1907-21J-ONP)
Size: 16s
Jewels: 21j
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Parallel
Movement Inlay Color: Black
Movement Setting: Pendant
Plate: Bridge Plate
Bridge Type: Center
Double Roller: Yes
Barrel: Going
Regulator: Reed
Hairspring: Breguet
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: No
Dial Feet Locations: 10.7, 24.3, 48.9
Case: Various
Run ID: 243.G9.16S160.161907M67.O150.P161.21J30
Database Version: v52.304
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
53.59
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
178.08
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
3.445%
Registry Population: 3 (0.38%)
$ Estimated Value (12 Month Change): 14.34% Analyzing 171 Sales

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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 · June 25, 2021

Serial Number 1153668 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Mixed to Pendant

Anonymous · August 4, 2020

Serial Number 1153649 was reported as inaccurate.

Note: It has a temperature setting below the mechanism
that I can see. And a calibration range. It was
used by my grandfather when he worked on the L&N
railway and has all the craft marks from all who
have worked on it in the past.
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:
Movement Setting changed from Mixed to Pendant

Anonymous · January 24, 2020

Serial Number 1153123 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Mixed to Pendant

Anonymous · January 27, 2019

Serial Number 1153530 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Mixed to Pendant
E. Howard Watch Co. (Keystone) Grade Series 10 Pocket Watch