1972 S Proof Master Die Doubling?

[Brad]

Just wanted to confirm that this proof was Master Die Doubling

[JeanK]

Hey Brad,
I am not the expert you need for this answer, but I believe it is MD. Now I need to go back to my examples of this coin and see if they match up to yours and the CONECA attribution numbers. Personally, I like these dramatic looking error coins.
Jean

[kloccwork419]

Looks like it to me. Got a pic of IN that would really show it is

[mustbebob]

I can confirm it is the Master Die Doubling. They showed up on everything in 1972. Very nice pics too!