Can someone tell me what A/C compressors I have?

I was at the Chrysler as Carlisle show at my spots and someone told me one of them is for A-body and the other one with the cast heavy duty bracket is for a early 60's car. Not sure what the big one goes to but probably a C-body. I love R-12 and wish I could find someone to put in R-12. Going to get these rebuilt and completly done over.

Wizard