It is Concave around the base, but would not be necessary for static display. Would have to be done in a female mold w/ flippers because of recess behind site glasses.

Reproduction/Fantasy Cans
http://i124.photobucket.com/albums/p2/oldegaspump/AllCansMASTERTHUMBNAIL_zps4bfdbbc7.jpg
Rnd Can Re-lids