Didn't any of you guys buy the 50th anniversary Land Cruiser book by Toyota? I got mine through SOR. It is pretty definative regarding the origins. F is for the F series of engines.
Anyway, back to the original question, besides the "hood ornament" on earlier 40s, the ashtray frame is chromed, and there are bezels around the earlier tail lights and rear reflectors which are chromed, and of course OEM hubcaps are chromed. Certain non-USA 40 series got chrome bezels (they were big in the Japanese market). That is about all I can think of.
FWIW, my Dad used to call Land Cruisers "Japanese Jeeps".