Came in two sizes: a big one (few aboard, mostly in the crew's mess, FTR, etc., and mostly a small one (about 9 in. diam). Only subs and small vessels had the small fans, for the most part. Most surface ships used the larger 12-in. fans. The fans were all black with wire safety cages that wouldn't pass muster today. The cage only kept your hand safe, not fingers!
They are very hard to come by for two reasons:
1. The USN changed to a grey wire caged fan with small openings in the late 1960s and most boats still in commission were retrofitted (too many chopped fingers?) and the older fans were tossed.
2. The only place to find them would be aboard the small WWII ships that went out of commission just after the war and have been in mothballs. Good luck, there are about six such ships and they're about to be scrapped... and we went through them looking for the small ones!
SADLY: COD's complete set of fans was decimated by a handful of nutjob subvets who wanted to "clean up COD" for tours and tossed many of them!!! Theses are DC fans, and they run forever! Tiny cloth wicks that feed oil from a tiny lube cup. They might be replicated someday!
But generall they were everywhere from the photos I have of COD: two in the mess, one each in the officer's staterooms, conningtower had several... generally up to the crew.
I'll check the COD's fans for model numbers, etc.
Paul