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 1 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 1

Manufacturer: E. Howard Watch Co. (Keystone) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 1101292 Question Mark
Grade: Series 1 Question Mark
Variation: Mixed Question Mark
Model: 1907 Question Mark
Estimated Production Year: 1910 Question Mark
Run Quantity: 1,500 Question Mark
Grade/Model Run: 3 of 7 Question Mark
Grade/Model Total Production: 5,700 Question Mark
Variant Est. Production: 3,000 (16S-M1907-21J-ONL-A0PTI-MIXED) Question Mark
Size: 16s Question Mark
Jewels: 21j Question Mark
Jewel Material: Ruby & Sapphire 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: Safety Question Mark
Regulator: Reed Question Mark
Hairspring: Breguet Question Mark
Pallet Jewel Material: Sapphire Question Mark
Standard Dial Type: Double-Sunk Question Mark
Adjusted: Yes Question Mark
Adjusted to Position: Yes Question Mark
Adjusted # of Positions: 3 or 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.
Adjusted
21 Jewels
[Star in Arrow]
Pat'd. '08
Extra Adjustment
Five Positions
Temperature
Case: Various Question Mark
Run ID: 195.G5.16S133.161907M33.O119.L23.21J14 Question Mark
Database Version: v52.428 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
17.16 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
60.28 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
1.091% Question Mark
Registry Population:
Scoped for This Run Only
10 (0.67%) Question Mark
Research Note: Mixed Run: Marked "No. 1" or "No. 10" or no series marking. #1100348 and #1100388: Marked "No. 10."

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.


cjbrem Supporter 859 · September 3, 2024

Serial Number 1101197 was reported as accurate.

weepinglion 48 · August 27, 2024

Serial Number 1101376 was reported as accurate.

MoatsJustin1 top-contributor 5261 · December 14, 2023

Serial Number 1101105 was reported as accurate.

Anonymous · September 22, 2022

Serial Number 1101143 was reported as accurate.

CJEmpire3 110 · December 2, 2021

Serial Number 1101177 was reported as accurate.

Anonymous · May 2, 2021

Serial Number 1100360 was reported as accurate.

Anonymous · December 11, 2020

Serial Number 1100199 was reported as accurate.

ABUMALEK 97 · April 29, 2020

Serial Number 1100713 was reported as accurate.

Schmidty Supporter 7 · February 10, 2020

Serial Number 1101466 was reported as accurate.

Harlton Supporter 98 · January 27, 2020

Serial Number 1100084 was reported as accurate.

cjbrem Supporter 859 · January 4, 2020

Serial Number 1100329 was reported as accurate.

Anonymous · November 20, 2019

Serial Number 1101088 was reported as accurate.

Anonymous · November 17, 2019

Serial Number 1100426 was reported as accurate.

Anonymous · July 21, 2019

Serial Number 1101077 was reported as accurate.

tink5249 2 · May 25, 2019

Serial Number 1100506 was reported as accurate.

Anonymous · May 22, 2019

Serial Number 1100199 was reported as accurate.

cjbrem Supporter 859 · March 24, 2019

Serial Number 1100329 was reported as accurate.

Anonymous · February 28, 2019

Serial Number 1100506 was reported as accurate.

Anonymous · February 18, 2019

Serial Number 1101108 was reported as inaccurate.

Note: The series 1, 21J, safety barrel movement is a RR
grade movement, It is lever set and adjusted to 5
positions
Curator Response: Thanks for the report. The setting mechanism for this run was previously undetermined. Being lever-set, your watch would absolutely qualify for railroad service.
Changes since this report was submitted:
Movement Setting changed from Lever or Pendant to Lever
Railroad Grade changed from No to Yes

Anonymous · January 21, 2019

Serial Number 1100934 was reported as inaccurate.

No further details were submitted with the report.
Changes since this report was submitted:
Movement Setting changed from Lever or Pendant to Lever
Railroad Grade changed from No to Yes
E. Howard Watch Co. (Keystone) Grade Series 1 Pocket Watch