The listing, USA #1557 1975 Mariner 10 probe going to Venus & Mercury stamp, mint has ended.
USA stamp commemorating the Mariner 10 probe going to the planets Venus & Mercury
Year: 1975
Catalog # 1557
Condition: full gum, mint never hinged, post office fresh
I have several of these stamps, all identical, the scan 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/