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)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1054994
Grade: Series 7
Model: 1908
Estimated Production Year: 1911
Run Quantity: 1,200
Grade/Model Total Production: 51,850
Variant Est. Production: 46,850 (12S-M1908-17J-ONP)
Size: 12s
Jewels: 17j
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Pendant
Plate: Bridge Plate
Double Roller: Yes
Barrel: Safety
Hairspring: Breguet
Adjusted: Yes
Adjusted # of Positions: 3
Adjusted to Temperature: Yes
Railroad Grade: No
Case: Various
Registry Population: 3 (0.25%)
Database Version: v49.701
Research Note: Some Equipped with Stop-Works

Production Metrics Tree: Grade Series 7

Target Profile: 12S-M1908-17J-ONP-A3PT

E. Howard Watch Co. (Keystone) Grade Series 7 (All Variations): 224,550 ETP
12S: 224,550 100.00%
12s, Grade Series 7
12S-M1908: 51,850 23.09%
12s, Grade Series 7, Model 1908
Other: 172,700
Other Models or Unclassified
12S-M1908-17J: 51,850 23.09%
12s, Grade Series 7, Model 1908, 17 Jewels
12S-M1908-17J-ONP: 46,850 20.86%
12s, Grade Series 7, Model 1908, 17 Jewels, Openface/Pendant/Nickel
Other: 5,000
Other Configs or Unclassified
12S-M1908-17J-ONP-A3PT: 46,850 20.86%

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1 1054831 #331 Collection August 03, 2019
2
Image Credit: 4mula1fan
1054994 #494 Collection September 18, 2019
3
Image Credit: Blicquer
1055440 #940 Collection November 25, 2021
Standard Deviation of Known Examples: 315.27 (Expected: 346.55, Δ31.29/2.61%)

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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.


Blicquer Supporter 48 · July 10, 2022

Serial Number 1055440 was reported as accurate.

Anonymous · August 5, 2020

Serial Number 1055684 was reported as accurate.

lcprice1 1 · November 3, 2019

Serial Number 1054827 was reported as accurate.

Anonymous · August 3, 2019

Serial Number 1054831 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge
E. Howard Watch Co. (Keystone) Grade Series 7 Pocket Watch