Pocket Watch Database

From the American Horology Archive:
Waltham Grade No. 645 Pocket Watch Movement

American Waltham Watch Co.

Grade: No. 645

Manufacturer: Waltham
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 22120931
Grade: No. 645
Model: 1908
Estimated Production Year: 1918
Run Quantity: 1,500
Total Production: 59,300
Size: 16s
Jewels: 21j
Jewel Material: Ruby
Jewel Setting: Screw-Set
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: Bridge Plate
Double Roller: Yes
Barrel: Jeweled Motor
Regulator: Micrometer
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
Data Research: 1954 Waltham "Gray Book" List

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Data Verification Reports

22120501
Verification Serial Map
22122000

texnet 570 · October 4, 2019

Serial Number 22120931 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Chronos89 6 · September 26, 2019

Serial Number 22120931 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · July 27, 2015

Serial Number 22120754 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · May 24, 2013

Serial Number 22120923 was reported as inaccurate.

Note: Adjusted 5 position Railroad grade Yes
Changes since this report was submitted:
Adjusted # Positions changed from No to 5
Plate changed from 3/4 to Bridge
Waltham Grade No. 645 Pocket Watch Movement