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 6 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 6

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1308342
Grade: Series 6
Model: 1912
Estimated Production Year: 1916
Run Quantity: 5,000
Grade/Model Run: 10 of 10
Grade/Model Total Production: 13,000
Size: 12s
Jewels: 19j
Jewel Setting: Burnished Jewels
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Pendant
Plate: Bridge Plate
Double Roller: Yes
Regulator: Micrometric
Hairspring: Breguet
Standard Dial Type: Single-Sunk
Adjusted: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Railroad Grade: No
Movement Markings: E. Howard Watch Co.
Boston U.S.A.
19 Jewels
[Triangle in Arrow]
Pat'd '12
Adjustment
Five Positions And Temperature
Case: Various
Run ID: 305.G19.12S79.121912M34.O218.P215.19J50
Database Version: v52.407
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
39.14
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
137.61
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
2.488%
Registry Population:
Scoped for This Run Only
11 (0.22%)

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Does this information describe your movement accurately?

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 · August 3, 2024

Serial Number 1307511 was reported as accurate.

GammaSky 4 · July 16, 2024

Serial Number 1306196 was reported as inaccurate.

No further details were submitted with the report.

Anonymous · July 15, 2024

Serial Number 1306196 was reported as inaccurate.

Note: Marked "17 Jewels", "3 Pos". Arrow with circle --
no triangle. The only capped jewel is the
balance, so it does appear to be 17 jewels. The
series seems to be mixed.

esrun59 15 · June 9, 2023

Serial Number 1308342 was reported as accurate.

Anonymous · September 11, 2022

Serial Number 1307185 was reported as accurate.

Anonymous · June 19, 2022

Serial Number 1307661 was reported as accurate.

Anonymous · March 4, 2021

Serial Number 1307363 was reported as accurate.

Anonymous · March 4, 2021

Serial Number 1307363 was reported as accurate.

Anonymous · August 1, 2020

Serial Number 1307185 was reported as accurate.

Anonymous · July 10, 2020

Serial Number 1307185 was reported as accurate.

Anonymous · April 8, 2020

Serial Number 1304064 was reported as accurate.

Anonymous · September 25, 2019

Serial Number 1308154 was reported as accurate.

Anonymous · March 3, 2019

Serial Number 1304268 was reported as inaccurate.

Note: My watch with this serial number is a 19 jewel
movement.
Curator Response: Thanks for the report. The database has been updated accordingly.
Changes since this report was submitted:
Grade changed from Series 7 to Series 6
Jewels changed from 17j to 19j
Movement Configuration changed from Openface or Hunting to Openface
Adjusted # Positions changed from 3 to 5
Plate changed from 3/4 to Bridge

Anonymous · January 19, 2019

Serial Number 1307099 was reported as accurate.

WLBelkriver33 804 · January 13, 2019

Serial Number 1308071 was reported as accurate.

Anonymous · October 10, 2018

Serial Number 1304027 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 6 Pocket Watch