The listing, USA #1311 1966 6th International Exhibition souvenir sheet, mint has ended.
USA souvenir sheetlet commemorating the 6th International Philatelic Exhibition
Year: 1966
Catalog # 1311
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/