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 7 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 7

Manufacturer: E. Howard Watch Co. (Keystone) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 1002767 Question Mark
Grade: Series 7 Question Mark
Variation: Stopworks Question Mark
Model: 1908 Question Mark
Estimated Production Year: 1908 Question Mark
Run Quantity: 3,000 Question Mark
Grade/Model Run: 6 of 20 Question Mark
Grade/Model Total Production: 53,450 Question Mark
Variant Est. Production: 10,250 (12S-M1908-17J-ONP-A3PT-STOPWORKS) Question Mark
Size: 12s Question Mark
Jewels: 17j Question Mark
Jewel Setting: Burnished Jewels Question Mark
Movement Configuration: Openface Question Mark
Movement Finish: Nickel Question Mark
Finish Pattern: Paralell Question Mark
Movement Setting: Pendant Question Mark
Plate: Bridge Plate Question Mark
Double Roller: Yes Question Mark
Barrel: Safety Question Mark
Regulator: Reed Question Mark
Hairspring: Breguet Question Mark
Standard Dial Type: Single-Sunk Question Mark
Adjusted: Yes Question Mark
Adjusted # of Positions: 3 Question Mark
Adjusted to Temperature: Yes Question Mark
Railroad Grade: No Question Mark
Movement Markings: E. Howard Watch Co.
Boston U.S.A.
Adjusted
17 Jewels
Pat'd '08
Case: Various Question Mark
Run ID: 138.G6.12S7.121908M7.O79.P115.17J102 Question Mark
Database Version: v52.504 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
132.32 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
465.47 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
8.406% Question Mark
Registry Population:
Scoped for This Run Only
10 (0.33%) Question Mark
$ Estimated Value (12 Month Change): 5.92% Analyzing 417 Sales Question Mark
Research Note: Production Note: Waltham-era production serial numbers collide with later production. The 23-Jewel movements were manufactured by Waltham for the E. Howard Watch Co., while the 17-Jewel movements were manufactured by E. Howard in a later era. The serial numbers for these production blocks overlap up to approximately serial 1000600.

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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 · October 13, 2024

Serial Number 1002509 was reported as accurate.

Changes since this report was submitted:
Grade changed from Missing Data to Series 7

Anonymous · September 16, 2024

Serial Number 1000535 was reported as accurate.

Changes since this report was submitted:
Grade changed from Series 0 to Series 7
Size changed from 16 to 12
Factory Model changed from 1903 to 1908
Movement Configuration changed from Hunting to Openface
Jewels changed from 23j to 17j
Adjusted # Positions changed from 5 to 3

Anonymous · June 25, 2023

Serial Number 1000112 was reported as inaccurate.

Note: This movement is stamped 17 jewels, not 23.
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection for further evaluation and documentation.
Changes since this report was submitted:
Grade changed from Series 0 to Series 7
Size changed from 16 to 12
Factory Model changed from 1903 to 1908
Movement Configuration changed from Hunting to Openface
Jewels changed from 23j to 17j
Adjusted # Positions changed from 5 to 3

Anonymous · June 27, 2021

Serial Number 1000458 was reported as accurate.

Changes since this report was submitted:
Grade changed from Series 0 to Series 7
Size changed from 16 to 12
Jewels changed from 23j to 17j
Movement Configuration changed from Hunting to Openface
Factory Model changed from 1903 to 1908
Adjusted # Positions changed from 5 to 3

Anonymous · June 23, 2021

Serial Number 1000139 was reported as accurate.

Changes since this report was submitted:
Grade changed from Series 0 to Series 7
Size changed from 16 to 12
Jewels changed from 23j to 17j
Movement Configuration changed from Hunting to Openface
Factory Model changed from 1903 to 1908
Adjusted # Positions changed from 5 to 3

Anonymous · May 24, 2021

Serial Number 1001309 was reported as accurate.

Anonymous · May 21, 2021

Serial Number 1001396 was reported as accurate.

azgemlab 2 · February 10, 2021

Serial Number 1001856 was reported as accurate.

Anonymous · September 15, 2020

Serial Number 1002566 was reported as accurate.

Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · August 14, 2020

Serial Number 1002871 was reported as inaccurate.

No further details were submitted with the report.
Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · July 18, 2020

Serial Number 1001172 was reported as accurate.

Anonymous · October 6, 2019

Serial Number 1000412 was reported as inaccurate.

Note: Watch has inscription date of June 1909
Curator Response: Thanks for the report. Due to the method of production at the E. Howard (Keystone) factory, estimated production dates are expected to be within +/- 3 years.
Changes since this report was submitted:
Grade changed from Series 0 to Series 7
Size changed from 16 to 12
Jewels changed from 23j to 17j
Movement Configuration changed from Hunting to Openface
Factory Model changed from 1903 to 1908
Adjusted # Positions changed from 5 to 3

Anonymous · August 29, 2019

Serial Number 1000730 was reported as inaccurate.

No further details were submitted with the report.
Changes since this report was submitted:
Grade changed from Series 0 to Series 7
Size changed from 16 to 12
Jewels changed from 23j to 17j
Movement Configuration changed from Hunting to Openface
Factory Model changed from 1903 to 1908
Adjusted # Positions changed from 5 to 3

ralph1 113 · July 12, 2019

Serial Number 1000518 was reported as inaccurate.

Note: 16 size open face, 17 jewel adjusted. pat.D.08
E Howard Watch Co Boston USA, .S #1000518
Curator Response: Thanks for the report. If possible, please upload an image of the movement to your collection so we can take a closer look.
Changes since this report was submitted:
Grade changed from Series 0 to Series 7
Size changed from 16 to 12
Jewels changed from 23j to 17j
Movement Configuration changed from Hunting to Openface
Factory Model changed from 1903 to 1908
Adjusted # Positions changed from 5 to 3

Anonymous · July 3, 2019

Serial Number 1001842 was reported as accurate.

Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · June 14, 2019

Serial Number 1002876 was reported as accurate.

Changes since this report was submitted:
Grade changed from ? to Series 7

Anonymous · March 2, 2019

Serial Number 1002846 was reported as inaccurate.

Note: The patent mark on the back shows “patd’08”
and the case was engraved as a gift in November of
1909 suggesting this serial number is from 1909 or
earlier and not 1911
Curator Response: Thanks for the report. The production years displayed are simply estimates based on serial number extrapolation, usually accurate within +/- 3 Years. This is especially true with the Keystone Howards, as no factory records detailing the serialized production survived. Based on your evidence, it is likely the watch was produced in 1909. If possible, upload images of the watch to the site to provide documentation for furture research, especially since this is currently an undefined run.
Changes since this report was submitted:
Grade changed from ? to Series 7
E. Howard Watch Co. (Keystone) Grade Series 7 Pocket Watch