ClockHistory.com is not a parts supplier — please do not ask us for parts. I provide this information to assist those who repair old Westclox clocks.
Repair tips for antique Big Ben and Baby Ben alarm clocks
Mainspring chart for antique Big Ben and Baby Ben alarm clocks and other old Westclox clocks
Glass and Lens chart for antique Big Ben and Baby Ben alarm clocks and other old Westclox clocks
Train counts and beat rates of antique Big Ben and Baby Ben alarm clocks and model 66 movement
1909 Boyproof Watch Parts Catalog - 1.5 MB PDF file.
Ca. 1916 Material Catalog - 4.5 MB PDF file
1919 "First Aid for Injured Westclox" - parts and repair manual. (17 MB PDF file). This book is refrerenced in the August 1919 Tick Talk magazine, p. 6.
1919 "First Aid for Injured Westclox"- text transcription of repair hints and general information from above catalog.
Illustrated Catalog of Westclox Materials - published by Henry Paulson & Co., Chicago, 1943 (5.5 MB PDF file). Note: some catalogs state "37 So. Wabash Ave." and some state "131 So. Wabash Ave." The PDF file has the first 23 pages from one catalog (131 So. Wabash), and the last from another (37 So. Wabash).
1950 "First Aid for Injured Westclox" - parts and repair manual (35 MB PDF file).
1950 "First Aid for Injured Westclox" - text transcription of repair hints and glass size chart from above catalog.
Use a 25 watt clear appliance bulb, with T-8 bayonet base. This is available at hardware stores.