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 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 3

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 916496
Grade: Series 3
Model: 1905
Estimated Production Year: 1908
Run Quantity: 3,000
Grade/Model Run: 19 of 44
Grade/Model Total Production: 61,640
Variant Est. Production: 28,700 (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: 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: 47.G19.16S30.161905M30.O29.P38.17J33
Database Version: v52.245
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
86.41
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
287.19
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
5.554%
Registry Population: 77 (2.57%)
$ Estimated Value (12 Month Change): 1.69% Analyzing 183 Sales
Research Note: #916117: Reported as Lever-Set.

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.


pmtime Supporter 405 · January 6, 2024

Serial Number 915408 was reported as accurate.

us0204 Supporter 32 · September 11, 2023

Serial Number 915881 was reported as inaccurate.

Note: Dial feet location is different than what is on
the data base. Mine are approximate as follows,
8.0-24.1-45.2

aconner 62 · October 20, 2021

Serial Number 915661 was reported as accurate.

aconner 62 · September 18, 2021

Serial Number 915661 was reported as accurate.

aconner 62 · September 18, 2021

Serial Number 915661 was reported as inaccurate.

Note: This watch, reported as open face configuration is
actually a hunting case configuration.
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.

Anonymous · July 6, 2021

Serial Number 917641 was reported as accurate.

Anonymous · August 21, 2019

Serial Number 915392 was reported as accurate.

Anonymous · August 12, 2019

Serial Number 915595 was reported as accurate.

Anonymous · May 6, 2019

Serial Number 915519 was reported as accurate.

Anonymous · February 2, 2019

Serial Number 917323 was reported as accurate.

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