Well I'm really a newb but I have a couple of items that I really enjoy admiring.
These are 2 of my favorites that I bid fairly aggressively for me being new but I liked the cancels quite a bit, I don't think they are true part perfs maybe eventually I'll send them off to see.
This block I got a couple of weeks ago and again I bid a little aggressive but I really enjoy the block with multiple cancels. When it finally arrived and I was inspecting it I noticed something looked a little strange with the top 2 stamps, it is more obvious on the right one, I put a picture below.
To me it looks like a double transfer, but I'm new and can't tell for sure.
I really enjoyed reading and seeing all of the wonderful cancels and will share any more I get my hands on.
edit: corrected word use (original post on cell phone