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 4 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 4

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 955804
Grade: Series 4
Model: 1905
Estimated Production Year: 1910
Run Quantity: 1,000
Grade/Model Run: 10 of 22
Grade/Model Total Production: 16,610
Variant Est. Production: 8,980 (16S-M1905-17J-ONP)
Size: 16s
Jewels: 17j
Jewel Material: Ruby & Sapphire
Jewel Setting: Gold Settings (Screw-Set)
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Checkerboard
Movement Setting: Pendant
Plate: 3/4 Plate
Double Roller: Yes
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: No
Dial Feet Locations: 10.7, 24.3, 48.9
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667
Case: Various
Run ID: 80.G10.16S62.161905M58.O46.P66.17J61
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
39.16
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
130.83
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
2.531%
Registry Population: 20 (2.00%)
$ Estimated Value (12 Month Change): -14.01% Analyzing 69 Sales
Research Note: #955294: Reported as Lever-Set. #955942: Reported as Hunting instead of Openface. #955728: Verified with Gold Meantime Screws and Brass Balance Screws (more consistent with the Series 9) [JH]

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.


Anonymous · November 3, 2023

Serial Number 955086 was reported as accurate.

dai4583 58 · January 9, 2022

Serial Number 955498 was reported as accurate.

hudnic Supporter 78 · March 5, 2021

Serial Number 955350 was reported as accurate.

Anonymous · May 25, 2020

Serial Number 955783 was reported as accurate.

Anonymous · March 17, 2020

Serial Number 955246 was reported as accurate.

bubba70 543 · June 18, 2019

Serial Number 955728 was reported as accurate.

Anonymous · February 10, 2019

Serial Number 955771 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 4 Pocket Watch