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)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1050492
Grade: Series 5
Variation: Straight Bridge Jeweled Barrel
Model: 1907
Estimated Production Year: 1911
Run Quantity: 700
Grade/Model Run: 8 of 27
Grade/Model Total Production: 16,600
Variant Est. Production: 4,100 (16S-M1907-19J-ONL-A5PTI-STRAIGHT BRIDGE JEWELED BARREL)
Size: 16s
Jewels: 19j
Jewel Material: Ruby & Sapphire
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: Bridge Plate
Bridge Type: Center
Double Roller: Yes
Barrel: Jeweled Safety
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: Yes
Dial Feet Locations: 10.7, 24.3, 48.9
Case: Various
Run ID: 143.G8.16S106.161907M17.O78.L10.19J14
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
45.51
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
152.05
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
2.942%
Registry Population: 4 (0.57%)
$ Estimated Value (12 Month Change): -5.16% Analyzing 87 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 · November 18, 2023

Serial Number 1050641 was reported as inaccurate.

Note: Mine is a 16 size 19 jewel adjusted model 1907
series 5 with 2 finger bridge nickel movement.
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 Missing Data to Series 5

Anonymous · January 3, 2020

Serial Number 1050132 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 5 Pocket Watch