I stand corrected. Lynn sent me a link to a couple of articles about celluloid shoes. One article from 1931 talked about celluloid toe and heel sections of an upper with leather straps worked between them, which would work, for a while until the celluloid got brittle with age. This article later went on to refer to coconut lampshades and using maps for wallpaper - so it wasn't reporting mainstream fashions but rather peculiarities. The other article refers to 2 inch platform soles in Paris in 1939, but this article was written by a socialite and her reportage of what she saw in Paris, and I suspect she got the information wrong - it might have been lacquered wood, or perhaps a strip of celluloid covering the outside edges of a wood platform - I don't believe celluloid can be used as a construction material in shoes - there is no give to it and it will break. I would love to see a pic of a celluloid shoe, because I doubt they were ever put into production -- paper shoes were reportedly available at department stores according to an article appearing in Harper's Bazaar in 1968 but that's not true. The few pairs of paper shoes that exist in museum collections were all made for photo shoots, promotion, window display, etc. So the info we read in newspapers is not always proper trend reportage.