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: 1154346
Grade: Series 10
Variation: Ser. 10
Model: 1907
Estimated Production Year: 1912
Run Quantity: 800
Grade/Model Run: 11 of 23
Grade/Model Total Production: 17,800
Variant Est. Production: 15,550 (16S-M1907-21J-ONL)
Size: 16s
Jewels: 21j
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Parallel
Movement Inlay Color: Black
Movement Setting: Lever
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: Yes
Dial Feet Locations: 10.7, 24.3, 48.9
Case: Various
Run ID: 246.G11.16S163.161907M70.O153.L39.21J32
Database Version: v52.221
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
53.29
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: 6 (0.75%)
$ Estimated Value (12 Month Change): 10.27% 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 · April 19, 2022

Serial Number 1154981 was reported as accurate.

timekeeper48 Supporter 88 · November 26, 2021

Serial Number 1154470 was reported as accurate.

Anonymous · July 20, 2021

Serial Number 1154914 was reported as inaccurate.

Note: Lever set RR grade
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes

Anonymous · July 11, 2021

Serial Number 1154914 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes

Anonymous · September 17, 2020

Serial Number 1154759 was reported as inaccurate.

Note: This one is a series 10 lever set and is Railroad
grade.
Curator Response: Thanks for the report. This is a mixed run with lever-set and pendant-set movement. The lever-set movements would have qualified for railroad service, as you correctly indicated.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes

Anonymous · September 17, 2020

Serial Number 1154759 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes

Anonymous · April 22, 2019

Serial Number 1154683 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes

Anonymous · November 3, 2018

Serial Number 1154412 was reported as accurate.

Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes
E. Howard Watch Co. (Keystone) Grade Series 10 Pocket Watch