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: 1171030
Grade: Series 10
Model: 1907
Estimated Production Year: 1913
Run Quantity: 1,680
Grade/Model Run: 15 of 21
Grade/Model Total Production: 17,800
Variant Est. Production: 15,650 (16S-M1907-21J-ONL)
Size: 16s
Jewels: 21j
Jewel Setting: Burnished Jewels
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
Standard Dial Type: Double-Sunk
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
Movement Markings: E. Howard Watch Co.
Boston U.S.A.
21 Jewels
Series 10
[Star in Arrow]
Pat'd. '10
Extra Adjustment
Five Positions
Temperature
Case: Various
Run ID: 261.G15.16S179.161907M74.O179.L53.21J38
Database Version: v52.407
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
188.45
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
3.407%
Registry Population:
Scoped for This Run Only
8 (0.48%)
$ Estimated Value (12 Month Change): 11.54% Analyzing 174 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.


aconner 62 · March 25, 2023

Serial Number 1170346 was reported as inaccurate.

Note: This watch is listed as pendent set in the data
base, but it is actually lever set. That is all.
Al
Curator Response: Thanks for the report. The database has been updated accordingly.
Changes since this report was submitted:
Movement Setting changed from Pendant to Lever
Railroad Grade changed from No to Yes

Anonymous · August 21, 2022

Serial Number 1170524 was reported as accurate.

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

chanea90 31 · July 29, 2022

Serial Number 1171217 was reported as inaccurate.

Note: This watch is a lever set and marked as shown and
would of qualified for railroad service when
produced.
Curator Response: This run is mixed. Yes, the lever-set variations would have qualified for railroad service.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes

Anonymous · February 27, 2022

Serial Number 1171749 was reported as accurate.

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

okiejohn 379 · November 29, 2021

Serial Number 1171773 was reported as accurate.

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

aconner 62 · July 24, 2021

Serial Number 1170346 was reported as accurate.

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

23Greenwich Supporter 242 · July 8, 2021

Serial Number 1170497 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 · December 1, 2020

Serial Number 1171987 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 · January 15, 2020

Serial Number 1171341 was reported as accurate.

Anonymous · December 9, 2018

Serial Number 1170324 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 10 Pocket Watch