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 3 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 3

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 924245
Grade: Series 3
Model: 1905
Estimated Production Year: 1909
Run Quantity: 6,000
Grade/Model Run: 20 of 44
Grade/Model Total Production: 61,640
Variant Est. Production: 32,940 (16S-M1905-17J-HNP)
Size: 16s
Jewels: 17j
Jewel Material: Ruby & Sapphire
Jewel Setting: Gold Settings (Screw-Set)
Movement Configuration: Hunting
Movement Finish: Nickel
Finish Pattern: Circular
Movement Setting: Pendant
Plate: 3/4 Plate
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Single-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 3
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: 49.G20.16S31.161905M31.H13.P39.17J34
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
98.62
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
329.63
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
6.375%
Registry Population: 99 (1.65%)
$ Estimated Value (12 Month Change): 2.26% Analyzing 181 Sales
Research Note: A few have been reported as openface.

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 · August 17, 2023

Serial Number 925888 was reported as accurate.

jacekjot 4 · June 16, 2023

Serial Number 925948 was reported as inaccurate.

No further details were submitted with the report.

GT350me 22 · July 25, 2022

Serial Number 922278 was reported as accurate.

Anonymous · July 25, 2022

Serial Number 922278 was reported as accurate.

Anonymous · May 16, 2022

Serial Number 924067 was reported as accurate.

Anonymous · January 31, 2022

Serial Number 922572 was reported as accurate.

Anonymous · January 11, 2022

Serial Number 923774 was reported as accurate.

Anonymous · December 29, 2021

Serial Number 922572 was reported as accurate.

Anonymous · July 20, 2021

Serial Number 923959 was reported as accurate.

Anonymous · July 1, 2021

Serial Number 925388 was reported as accurate.

Anonymous · June 30, 2021

Serial Number 922202 was reported as accurate.

Anonymous · January 17, 2021

Serial Number 926686 was reported as accurate.

Anonymous · January 16, 2021

Serial Number 926774 was reported as accurate.

Anonymous · September 18, 2020

Serial Number 924027 was reported as accurate.

Bostonwatch 59 · September 3, 2020

Serial Number 925932 was reported as accurate.

Anonymous · August 30, 2020

Serial Number 922413 was reported as accurate.

Anonymous · August 16, 2020

Serial Number 923462 was reported as accurate.

Anonymous · July 24, 2020

Serial Number 926466 was reported as accurate.

Anonymous · June 2, 2020

Serial Number 921709 was reported as accurate.

Anonymous · May 1, 2020

Serial Number 921021 was reported as accurate.

Anonymous · February 21, 2020

Serial Number 922202 was reported as accurate.

Anonymous · February 8, 2020

Serial Number 926377 was reported as accurate.

Anonymous · February 2, 2020

Serial Number 926978 was reported as accurate.

Anonymous · October 18, 2019

Serial Number 924432 was reported as accurate.

Anonymous · September 6, 2019

Serial Number 924094 was reported as accurate.

Anonymous · August 2, 2019

Serial Number 926466 was reported as accurate.

Anonymous · July 26, 2019

Serial Number 926466 was reported as accurate.

Anonymous · July 9, 2019

Serial Number 925321 was reported as accurate.

Anonymous · April 21, 2019

Serial Number 921689 was reported as accurate.

Anonymous · February 9, 2019

Serial Number 921483 was reported as accurate.

Andrew9000 85 · December 13, 2018

Serial Number 924245 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 3 Pocket Watch