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 9 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 9

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 971991
Grade: Series 9
Model: 1905
Estimated Production Year: 1910
Run Quantity: 1,000
Grade/Model Run: 6 of 15
Grade/Model Total Production: 16,610
Variant Est. Production: 5,110 (16S-M1905-17J-HNP)
Size: 16s
Jewels: 17j
Movement Configuration: Hunting
Movement Finish: Nickel
Finish Pattern: Checkerboard
Movement Setting: Pendant
Plate: 3/4 Plate
Double Roller: Yes
Hairspring: Breguet
Adjusted: Yes
Adjusted # of Positions: 3
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: No
Dial Feet Locations: 10.7, 24.3, 48.9
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667
Case: Various
Run ID: 99.G6.16S81.161905M73.H37.P82.17J76
Database Version: v52.245
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
15.38
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
51.05
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.989%
Registry Population: 14 (1.40%)
Research Note: Several Movements Reported as Marked "Abbott Watch Co." with Circular Pattern. #971204: Reported as Openface.

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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 · October 3, 2019

Serial Number 971704 was reported as inaccurate.

Note: My research on movement # 971704 found
conflicting info on the page. Two examples, 952897
and 962605 match, but the other five or six
examples on the page don't. Look at the barrel,
winding and balance locations! How can these be
the same movement? I am new to this collecting
business, and appreciate all info!
Curator Response: You are differentiating between hunting and openface movements. These can exist in different variations within the same grade. Openface typically winds at the 12:00 position while hunting winds at the 3:00 position. You will see this run is classified as "hunting."
Changes since this report was submitted:
Grade changed from Series 4 to Series 9
Adjusted # Positions changed from 5 to 3

Davidswatches 6 · March 3, 2019

Serial Number 971513 was reported as accurate.

Changes since this report was submitted:
Grade changed from Series 4 to Series 9
Adjusted # Positions changed from 5 to 3
E. Howard Watch Co. (Keystone) Grade Series 9 Pocket Watch