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: 1148958
Grade: Series 10
Variation: Ser. 10
Model: 1907
Estimated Production Year: 1912
Run Quantity: 1,820
Grade/Model Run: 4 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: 238.G4.16S155.161907M62.O145.L34.21J25
Database Version: v52.219
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: 8 (0.44%)
$ Estimated Value (12 Month Change): 10.27% Analyzing 171 Sales

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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 · October 14, 2023

Serial Number 1149501 was reported as accurate.

Anonymous · January 14, 2023

Serial Number 1149815 was reported as accurate.

Anonymous · January 11, 2023

Serial Number 1149815 was reported as inaccurate.

Note: This one is lever set.
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

avpalermo Supporter 568 · November 13, 2022

Serial Number 1149796 was reported as inaccurate.

Note: The movement setting for this serial number is
LEVER, NOT Pendant!
Please correct this error in your database,
kindly. Thank you.
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 Pendant to Lever
Railroad Grade changed from No to Yes

Anonymous · May 2, 2022

Serial Number 1148043 was reported as accurate.

Anonymous · June 21, 2021

Serial Number 1149501 was reported as inaccurate.

Note: This one is lever set. Probably railroad grade.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes

Anonymous · January 29, 2021

Serial Number 1148769 was reported as inaccurate.

No further details were submitted with the report.
Changes since this report was submitted:
Movement Setting changed from Mixed to Lever
Railroad Grade changed from No to Yes

jeromeschley 60 · January 18, 2021

Serial Number 1149602 was reported as accurate.

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

dstuartblue 17 · November 23, 2020

Serial Number 1148114 was reported as inaccurate.

Note: lever set, railroad grade
Curator Response: Thanks for the report. This is a mixed run with lever-set and pendant-set movements. 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 · October 16, 2020

Serial Number 1149165 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 · February 19, 2020

Serial Number 1149036 was reported as accurate.

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

backwardglance1 99 · December 5, 2019

Serial Number 1148655 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 1149514 was reported as inaccurate.

No further details were submitted with the report.
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