Westclox catalogs are an excellent source of information. I'm scanning all the catalogs as I can find, and putting them in my database. Westclox's earliest known catalog was published in 1901. The following page shows the Westclox catalogs I've found so far:
Westclox catalogs in the ClockHistory.com database
if you have any others. I'll be happy to scan and return them, receive them as donations, or buy them for a reasonable price. I particularly need catalogs from the 1910s through the 1950s; and catalogs published outside the USA (including Canada, Great Britain, Scotland and Australia). My mailing address is:
8 West Columbia Street
Flora, IN 46929
Thanks in advance for your generosity!
-- Bill Stoddard