4x4 transfer case ID?

[Rustbucket]

Does anyone know the correct ID's for 1960-61-62 1/2 ton and 3/4 ton 4WD transfer cases? I'd like to see if the transfer cases in a couple of my trucks are correct/original or if they were replaced.

[FetchMeAPepsi]

I know they had Rockwell (also called Timkin) T221s (I just pulled mine off for a rebuild) but are you meaning the numbers on the little plate? My plate is still coated in something akin to concrete so I'll have to get back with ya on that one. :(