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)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1116424
Grade: Series 2
Model: 1907
Estimated Production Year: 1911
Run Quantity: 500
Grade/Model Run: 1 of 6
Grade/Model Total Production: 6,500
Variant Est. Production: 4,000 (16S-M1907-17J-ONL)
Size: 16s
Jewels: 17j
Jewel Material: Ruby & Sapphire
Jewel Setting: Burnished Jewels
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: Bridge Plate
Bridge Type: Center
Double Roller: Yes
Barrel: Going
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: Yes
Dial Feet Locations: 10.7, 24.3, 48.9
Movement Markings: E. Howard Watch Co.
Boston U.S.A.
17 Jewels
[Empty Circle in Arrow]
Pat'd. '10
Adjustment
Five Positions
Temperature [Some Also Marked "Series 2"]
Case: Various
Run ID: 217.G13.16S149.161907M49.O139.L35.17J116
Database Version: v52.406
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
16.56
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
58.16
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
1.053%
Registry Population:
Scoped for This Run Only
3 (0.60%)

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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 · September 18, 2023

Serial Number 1116424 was reported as accurate.

randall48 Supporter 5 · February 10, 2022

Serial Number 1116169 was reported as accurate.

randall48 Supporter 5 · February 10, 2022

Serial Number 1116169 was reported as accurate.

randall48 Supporter 5 · February 10, 2022

Serial Number 1116169 was reported as accurate.

randall48 Supporter 5 · February 10, 2022

Serial Number 1116169 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 2 Pocket Watch