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 11 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 11

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1312217
Grade: Series 11
Variation: Arrow and Star
Model: E
Estimated Production Year: 1916
Run Quantity: 3,000
Grade/Model Run: 5 of 11
Grade/Model Total Production: 25,100
Variant Est. Production: 13,100 (16S-ME-21J-ONL-A5PTI-ARROW AND STAR)
Size: 16s
Jewels: 21j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: Bridge Plate
Hairspring: Breguet
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: Yes
Railroad Grade Classification: Class A
Case: Various
Run ID: 305.G5.16S187.M5.O199.L54.21J48
Database Version: v52.221
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
75.15
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
251.15
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
4.858%
Registry Population: 12 (0.40%)
$ Estimated Value (12 Month Change): 3.85% Analyzing 196 Sales

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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 · August 10, 2022

Serial Number 1312038 was reported as accurate.

Anonymous · July 25, 2022

Serial Number 1311541 was reported as inaccurate.

Note: This particular serial number movement doesn’t
have the “arrow and star” symbol designation
for 21 jewels but instead it’s designation is
“Railroad Chronometer “ and “RR Adjustment

Anonymous · March 29, 2022

Serial Number 1311192 was reported as accurate.

Anonymous · November 2, 2020

Serial Number 1311548 was reported as accurate.

Kurlander Supporter 25 · August 24, 2020

Serial Number 1311432 was reported as accurate.

rjmurton1964 34 · April 4, 2020

Serial Number 1312217 was reported as accurate.

Anonymous · January 7, 2020

Serial Number 1313697 was reported as accurate.

Pair1949 1 · September 14, 2019

Serial Number 1312667 was reported as accurate.

Anonymous · June 21, 2019

Serial Number 1311997 was reported as accurate.

Anonymous · January 27, 2019

Serial Number 1312534 was reported as accurate.

Anonymous · December 20, 2018

Serial Number 1313697 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 11 Pocket Watch