Looks like even ware to me, with no visible gap, which is a good indication of "reasonable" use. Hard to tell how much metal is still left though and if it can handle a re-lap but I think the heads are in at least fair shape.
I don't think they are...I think its just gunk...so are you saying a relap might be just thing if they are pitted, or even if they aren't? "Otherwise a re-lap might be just the thing." Did you mean to say "If so" instead of "Otherwise"?
You know the drill: clean, degauss, put on test tape, set azimuth, look at tones. If the machine can be adjusted to spec, yer good to go. If not, pay the man.
If I had to GUESS, I would suggest that those bridges between the individual track heads had something to do with track separation. There should be a mu metal shield that closes over the head when in use for electromagnetic shielding. Perhaps in some way these bridges were an Ampex trick to cut the magnetic effect of one tracks head on the adjacent tracks
+1
The Ampex List is great (unlike the late-and-not-lamented-uber-uptight Studer List). And one of the regular posters there, Steve Puntolillo of Sonicraft, is like a bizarro sweetbeats with his all his crazy restoration projects. Fun stuff to follow.