You know, one of the characters in the movie, "Harry Potter," (Colin Creevey) used an Argus C3.

http://www.lomography.com/magazine/l...d-the-argus-c3

Just by itself, the C3 looks pretty Steampunk. With a little wood and brass cosmetics, it would be the genuine article! With a Steampunk styled light meter, it would make a perfect combo!

(Or fit right in to a HP movie. )