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: 857902
Grade: Series 2
Model: 1905
Estimated Production Year: 1905
Run Quantity: 800
Grade/Model Run: 1 of 11
Grade/Model Total Production: 4,090
Variant Est. Production: 2,000 (16S-M1905-17J-HNP)
Size: 16s
Jewels: 17j
Jewel Material: Ruby & Sapphire
Jewel Setting: Raised Gold Settings (Screw-Set)
Movement Configuration: Hunting
Movement Finish: Nickel
Finish Pattern: Parallel Bar (narrow)
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: Yes
Dial Feet Locations: 10.7, 24.3, 48.9
U.S. Patents: 781263, 796162, 886387, 900183, 992013, 971496, 978612, 981667
Case: Various
Run ID: 17.G1.16S6.161905M6.H5.P17.17J11
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
6.43
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
21.42
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.416%
Registry Population: 21 (2.63%)
Research Note: #857234 and #857813: Reported as Lever-Set. #857321: Verified as Lever-Set. #857902: Verified as Pendant-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.


watchwinder 32 · January 10, 2024

Serial Number 857620 was reported as accurate.

updown655 25 · August 3, 2022

Serial Number 857392 was reported as accurate.

Anonymous · March 9, 2021

Serial Number 857900 was reported as accurate.

esoxhunter Top Contributor Supporter 127 · July 15, 2020

Serial Number 857321 was reported as inaccurate.

Note: Hi Nathan - Just a heads up: this watch appears
to be a 3/4 Plate, as are the others downloaded to
this page. Am I missing something?
Curator Response: Thanks for catching that. This run has been updated accordingly.
Changes since this report was submitted:
Plate changed from Bridge to 3/4

Kurlander Supporter 25 · December 5, 2019

Serial Number 857849 was reported as accurate.

Changes since this report was submitted:
Plate changed from Bridge to 3/4

rjbeck 150 · September 22, 2019

Serial Number 857985 was reported as accurate.

Changes since this report was submitted:
Plate changed from Bridge to 3/4

Anonymous · September 9, 2019

Serial Number 857985 was reported as accurate.

Changes since this report was submitted:
Plate changed from Bridge to 3/4

Anonymous · May 17, 2019

Serial Number 857788 was reported as accurate.

Changes since this report was submitted:
Plate changed from Bridge to 3/4

WLBelkriver33 804 · February 22, 2019

Serial Number 857614 was reported as accurate.

Changes since this report was submitted:
Plate changed from Bridge to 3/4
E. Howard Watch Co. (Keystone) Grade Series 2 Pocket Watch