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 2 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 2

Manufacturer: E. Howard Watch Co. (Keystone) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 1123299 Question Mark
Grade: Series 2 Question Mark
Model: 1907 Question Mark
Estimated Production Year: 1912 Question Mark
Run Quantity: 1,000 Question Mark
Grade/Model Run: 3 of 6 Question Mark
Grade/Model Total Production: 6,500 Question Mark
Variant Est. Production: 4,000 (16S-M1907-17J-ONL) Question Mark
Size: 16s Question Mark
Jewels: 17j Question Mark
Jewel Material: Ruby & Sapphire Question Mark
Jewel Setting: Burnished Jewels Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Movement Setting: Lever Question Mark
Plate: Bridge Plate Question Mark
Bridge Type: Center Question Mark
Double Roller: Yes 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: 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.
Series 2
17 Jewels
[Empty Circle in Arrow]
Pat'd. '08
Adjustment
Five Positions
Temperature
Case: Various Question Mark
Run ID: 227.G15.16S152.161907M52.O149.L38.17J118 Question Mark
Database Version: v52.452 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
16.56 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
58.16 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
1.053% Question Mark
Registry Population:
Scoped for This Run Only
6 (0.60%) Question Mark
Research Note: #1122867: Reported as Lever-Set. #1123252: Verified as Lever-Set. #1123350: Reported as Pendant-Set.

Help Us Help Others By Improving the Database:

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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.


Anonymous · October 9, 2022

Serial Number 1123263 was reported as accurate.

Jstork69 Supporter 13 · November 19, 2021

Serial Number 1122614 was reported as accurate.

TWW369 7 · September 12, 2021

Serial Number 1123252 was reported as inaccurate.

Note: 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

WatchFan63 Supporter 4 · August 2, 2020

Serial Number 1122959 was reported as accurate.

bunnofnickle 67 · July 1, 2020

Serial Number 1122733 was reported as accurate.

Anonymous · September 1, 2019

Serial Number 1122736 was reported as accurate.

Anonymous · October 25, 2018

Serial Number 1123350 was reported as inaccurate.

Note: Pendant (stem) set not lever

Anonymous · September 26, 2018

Serial Number 1122867 was reported as inaccurate.

Note: Lever set.
Changes since this report was submitted:
Movement Setting changed from Pendant to Lever
Railroad Grade changed from No to Yes
E. Howard Watch Co. (Keystone) Grade Series 2 Pocket Watch