Nice to hear from you.
One of the 1958 Rev B pieces I got yesterday looks very much like a proof. I asked the dealer if it was a proof and he said it wasn't.
I have 2 slabbed pieces, 1 NGC and 1 PCGS
that have proof-like obverses and reverses. One is a MS65 and the other a MS66. Your 1960 & 1961 piece might very well look like these.
You can always contact me through eBay. My user ID is also harveypb