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 5 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 5

Manufacturer: E. Howard Watch Co. (Keystone) Question Mark
Manufacturer Location: Waltham, Massachusetts Question Mark
Movement Serial Number: 1077862 Question Mark
Grade: Series 5 Question Mark
Variation: Hooked Bridge Jeweled Barrel Question Mark
Model: 1907 Question Mark
Estimated Production Year: 1910 Question Mark
Run Quantity: 300 Question Mark
Grade/Model Run: 13 of 26 Question Mark
Grade/Model Total Production: 16,400 Question Mark
Variant Est. Production: 800 (16S-M1907-19J-HNP-A5PTI-HOOKED BRIDGE JEWELED BARREL) Question Mark
Size: 16s Question Mark
Jewels: 19j Question Mark
Jewel Material: Ruby & Sapphire Question Mark
Movement Configuration: Hunting Question Mark
Movement Finish: Nickel Question Mark
Movement Setting: Pendant Question Mark
Plate: Bridge Plate Question Mark
Bridge Type: Center Question Mark
Double Roller: Yes Question Mark
Barrel: Jeweled Safety Question Mark
Regulator: Reed Question Mark
Hairspring: Breguet Question Mark
Pallet Jewel Material: Sapphire Question Mark
Standard Dial Type: Double-Sunk Question Mark
Adjusted: Yes Question Mark
Adjusted to Position: Yes Question Mark
Adjusted # of Positions: 5 Question Mark
Adjusted to Temperature: Yes Question Mark
Adjusted to Isochronism: Yes Question Mark
Railroad Grade: No Question Mark
Dial Feet Locations: 10.7, 24.3, 48.9 Question Mark
Movement Markings: E. Howard Watch Co.
Boston U.S.A.
Adjusted
19 Jewels
Pat'd. '08
Extra Adjustment
Five Positions
Temperature
Case: Various Question Mark
Run ID: 179.G14.16S124.161907M24.H56.P145.19J24 Question Mark
Database Version: v52.508 Question Mark
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
5.42 Question Mark
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
18.96 Question Mark
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
0.344% Question Mark
Registry Population:
Scoped for This Run Only
4 (1.33%) Question Mark
Research Note: #1077848: Reported as 23-Jewel, Hunting, Pendant-Set (Consistent with Series 0)

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.


Anonymous · January 21, 2022

Serial Number 1077976 was reported as accurate.

Anonymous · August 16, 2020

Serial Number 1077721 was reported as accurate.

Anonymous · April 5, 2019

Serial Number 1077848 was reported as inaccurate.

Note: This is a hunters style movement 23 jewels but is
not marked series 0 it is adjusted 5 positions and
only seemed to be offered in solid 14k gold
hunters cases. Also it is a stem set. And there is
no arrow on the bridge. It is very similar to the
series 0
Curator Response: Thanks for the report. I have noted this in the lookup information. If possible, please upload an image of the movement for further evaluation and documentation.
E. Howard Watch Co. (Keystone) Grade Series 5 Pocket Watch