I have a set of early rear calipers that came off my '71. These "worked" when I bought the car, but I would not in any way, shape or form try to use them.
These are considered cores... for rebuild or send to PMB.
To my knowledge, they are "all there"
$45 shipped, lower 48. Paypal.
I will include any rebuild kit parts I have. I might have two complete kits.
Let me know.
Jared