It's an A1. Spotting features are the five return rollers which were changed to three for the A3 and onwards, and the "Universal Ejector Fuel Kit", that rack on the back with the four 55 gallon drums.
What makes it not an A nothing is the commanders cupola with the built in M2.
The one with the busted track is also an A1.
The first, second and fourth ones I think are A2's because they look to have the later headlight clusters and sharp fender breaks, but I really don't know these tanks that well and if someone said they were an A3 I couldn't argue.
Oh I forgot, one other piece of good M48 information is the first five minutes of "G.I. Blues".
It's "free" on Xfinity.
Nice pictures, Carlos. I'll bet when you cut yourself shaving, the blood runs green.