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)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1100388
Grade: Series 1
Variation: Mixed
Model: 1907
Estimated Production Year: 1912
Run Quantity: 1,500
Grade/Model Run: 3 of 7
Grade/Model Total Production: 5,700
Variant Est. Production: 3,000 (16S-M1907-21J-ONL-A0PTI-MIXED)
Size: 16s
Jewels: 21j
Jewel Material: Ruby & Sapphire
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: Safety
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 3 or 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: 189.G3.16S125.161907M36.O107.L18.21J12
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
17.06
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
56.96
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
1.103%
Registry Population: 9 (0.60%)
Research Note: Mixed Run: Marked Either "No. 1" or "No. 10"

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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.


MoatsJustin1 top-contributor 4691 · December 14, 2023

Serial Number 1101105 was reported as accurate.

Anonymous · September 22, 2022

Serial Number 1101143 was reported as accurate.

CJEmpire3 100 · 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 499 · 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 499 · 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