This ad indicates that the company was in business at least as early as 1910. Other sources suggest that they remained active into the 1940's.
Source: Treasurenet.com 12/27/07: Member: "PBK" (one of the best researchers ever --in my book--on treasurenet.com) http://www.treasurenet.com/forums/what/68022-need-token-buff-pbk-gypsy-you-out-there-lol.html
Don........