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: 20040466
Grade: No. 645
Model: 1908
Estimated Production Year: 1915
Run Quantity: 1,000
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

20039501
Verification Serial Map
20040500

itsbeenrea 1 · June 9, 2020

Serial Number 20039828 was reported as accurate.

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

Anonymous · March 6, 2020

Serial Number 20039874 was reported as accurate.

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

Anonymous · March 5, 2020

Serial Number 20039929 was reported as accurate.

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

smolakb 6 · March 13, 2018

Serial Number 20040446 was reported as accurate.

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

Anonymous · October 7, 2017

Serial Number 20040136 was reported as inaccurate.

No further details were submitted with the report.
Changes since this report was submitted:
Plate changed from 3/4 to Bridge

Anonymous · May 8, 2017

Serial Number 20039885 was reported as accurate.

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

Anonymous · July 16, 2016

Serial Number 20040203 was reported as accurate.

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

Anonymous · January 17, 2016

Serial Number 20039965 was reported as accurate.

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

Anonymous · November 30, 2015

Serial Number 20040203 was reported as accurate.

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

Anonymous · July 17, 2015

Serial Number 20039950 was reported as accurate.

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

redjms Hampden Expert 54 · October 31, 2014

Serial Number 20040466 was reported as accurate.

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

Anonymous · October 15, 2013

Serial Number 20039528 was reported as accurate.

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

Anonymous · December 20, 2012

Serial Number 20039743 was reported as inaccurate.

Note: Does not say Riverside on train bridge.
It says "21 Jewels, 645, A.W.W. CO., WALTHAM
MASS"
Changes since this report was submitted:
Plate changed from 3/4 to Bridge
Waltham Grade No. 645 Pocket Watch Movement