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: 18138910
Grade: No. 645
Model: 1908
Estimated Production Year: 1911
Run Quantity: 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: Church 1892
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

18138501
Verification Serial Map
18139000

okwatch 14 · May 27, 2021

Serial Number 18138600 was reported as accurate.

Anonymous · April 17, 2021

Serial Number 18138600 was reported as accurate.

Anonymous · February 1, 2019

Serial Number 18138829 was reported as accurate.

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

RacerX 5 · July 7, 2017

Serial Number 18138910 was reported as accurate.

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

RacerX 5 · June 19, 2017

Serial Number 18138910 was reported as accurate.

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

Anonymous · January 22, 2017

Serial Number 18138595 was reported as accurate.

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

Anonymous · June 22, 2015

Serial Number 18138688 was reported as accurate.

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

Anonymous · December 8, 2012

Serial Number 18138634 was reported as accurate.

Changes since this report was submitted:
Plate changed from 3/4 to Bridge
Waltham Grade No. 645 Pocket Watch Movement