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) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 1148483 Question Mark
Grade: Series 10 Question Mark
Model: 1907 Question Mark
Estimated Production Year: 1910 Question Mark
Run Quantity: 1,820 Question Mark
Grade/Model Run: 4 of 21 Question Mark
Grade/Model Total Production: 17,800 Question Mark
Variant Est. Production: 15,650 (16S-M1907-21J-ONL) Question Mark
Size: 16s Question Mark
Jewels: 21j Question Mark
Jewel Setting: Burnished Jewels Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Finish Pattern: Parallel Question Mark
Movement Inlay Color: Black Question Mark
Movement Setting: Lever Question Mark
Plate: Bridge Plate Question Mark
Bridge Type: Center Question Mark
Double Roller: Yes Question Mark
Barrel: Going Question Mark
Regulator: Reed Question Mark
Hairspring: Breguet Question Mark
Standard Dial Type: Double-Sunk Question Mark
Adjusted: Yes Question Mark
Adjusted to Position: Yes Question Mark
Adjusted # of Positions: 5 Question Mark
Adjusted to Temperature: Yes Question Mark
Adjusted to Isochronism: Yes Question Mark
Railroad Grade: Yes Question Mark
Dial Feet Locations: 10.7, 24.3, 48.9 Question Mark
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 Question Mark
Run ID: 244.G4.16S164.161907M60.O162.L43.21J27 Question Mark
Database Version: v52.518 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
53.59 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
188.45 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
3.404% Question Mark
Registry Population:
Scoped for This Run Only
10 (0.55%) Question Mark
$ Estimated Value (12 Month Change): 10.79% Analyzing 176 Sales Question Mark

Help Us Help Others By Improving the Database:

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 645 · 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