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: 1171773 Question Mark
Grade: Series 10 Question Mark
Model: 1907 Question Mark
Estimated Production Year: 1913 Question Mark
Run Quantity: 1,680 Question Mark
Grade/Model Run: 15 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: 261.G15.16S179.161907M74.O179.L53.21J38 Question Mark
Database Version: v52.505 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
9 (0.54%) Question Mark
$ Estimated Value (12 Month Change): 7.69% Analyzing 177 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.


aconner 63 · 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 32 · 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 392 · 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 63 · 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 252 · 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