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: 1157979
Grade: Series 7
Model: 1912
Estimated Production Year: 1912
Run Quantity: 1,500
Grade/Model Total Production: 173,700
Variant Est. Production: 172,700 (12S-M1912)
Size: 12s
Jewels: 17j
Movement Configuration: Openface or Hunting
Movement Finish: Nickel
Movement Setting: Pendant
Plate: Bridge Plate
Double Roller: Yes
Hairspring: Breguet
Adjusted: Yes
Adjusted # of Positions: 3
Adjusted to Temperature: Yes
Railroad Grade: No
Case: Various
Registry Population: 1 (0.07%)
Database Version: v49.752

Production Metrics Tree: Grade Series 7

Target Profile: 12S-M1912-17J-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-M1912: 172,700 76.91%
12s, Grade Series 7, Model 1912
Other: 51,850
Other Models or Unclassified
12S-M1912-17J: 172,700 76.91%
12s, Grade Series 7, Model 1912, 17 Jewels
12S-M1912-17J-ONP: 172,700 76.91%
12s, Grade Series 7, Model 1912, 17 Jewels, Openface or Hunting/Pendant/Nickel
12S-M1912-17J-ONP-A3PT: 172,700 76.91%

Population Registry for This Run

Image Serial Number Run Position Primary Identification Method Discovery Date
1
Image Credit: geneg72
1157979 #1479 Collection January 09, 2018
Standard Deviation of Known Examples: 0.00 (Expected: 433.16, Δ433.16/28.88%)

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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.


PHIL1199 Supporter 631 · July 30, 2022

Serial Number 1157924 was reported as accurate.

Anonymous · May 26, 2020

Serial Number 1157372 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 7 Pocket Watch