The listing, USA #1754 1978 Dr. Papanicolaou - pap smear, mint has ended.
USA stamp commemorating Dr. George Papanicolaou - inventory of the pap smear test for early cancer detection
Year: 1978
Catalog # 1754
Condition: full gum, mint never hinged, post office fresh
I have several of these stamps, all identical, the scan shown is representative of what you will receive.
My general terms for stamp-related Listia lots can be found here (please read, it answers a lot of basic questions):
http://listiarules.webs.com/