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 1 Pocket Watch

E. Howard Watch Co. (Keystone)

Grade: Series 1

Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1107300
Grade: Series 1
Variation: Mixed
Model: 1907
Estimated Production Year: 1912
Run Quantity: 500
Grade/Model Run: 5 of 7
Grade/Model Total Production: 5,700
Variant Est. Production: 3,000 (16S-M1907-21J-ONL-A0PTI-MIXED)
Size: 16s
Jewels: 21j
Jewel Material: Ruby & Sapphire
Movement Configuration: Openface
Movement Finish: Nickel
Finish Pattern: Parallel
Movement Inlay Color: Black
Movement Setting: Lever
Plate: Bridge Plate
Bridge Type: Center
Double Roller: Yes
Barrel: Safety
Regulator: Reed
Hairspring: Breguet
Pallet Jewel Material: Sapphire
Standard Dial Type: Double-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 3 or 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: 200.G5.16S132.161907M43.O115.L21.21J16
Database Version: v52.219
Advanced Metrics
PWDB Absolute Rarity Index:
Scoped for Grade/Size/Model/Configuration
17.06
PWDB Relative Rarity Index:
Rarity within Manufacturer - Scoped for Grade/Size/Model/Configuration
56.96
Share of Production:
Share within Manufacturer - Scoped for Grade/Size/Model/Configuration
1.103%
Registry Population: 3 (0.60%)
Research Note: #1107413: Reported as Marked "No. 1." #1107051: Verified as Marked "No. 10"

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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.


daaim19 75 · August 21, 2022

Serial Number 1107114 was reported as accurate.

daaim19 75 · August 18, 2022

Serial Number 1107114 was reported as accurate.

winterwolf Supporter 97 · October 11, 2019

Serial Number 1107300 was reported as inaccurate.

Note: I noted a price guide listed 2 ones in this line.
The series 1 & the # 1. The guide states the #1 is
worth about $100 more than the series 1 model.
The series 1 is marked on the movement .... Are
those movements with no series 1 marking or any
other marking the # 1 movements?
Curator Response: Some movements in this run have been recorded as marked "No. 1" These are more uncommon that the standard Series 1, but both are considered to be classified as Series 1.

phantacc Supporter 66 · October 6, 2019

Serial Number 1107300 was reported as accurate.

E. Howard Watch Co. (Keystone) Grade Series 1 Pocket Watch