In Herz' USPC book, it shows that it was ordered by someone (not stated who) in Chicago IL, in 1920. I collect the stuff too and could use one if you have a dupe. ... .... ..... I have an unusual inlaid monogram for sale on eBay now:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=150140694967&ssPageName=STRK:MESE:IT&ih=005

Robert