I have this interesting gambling memorabilia up for auction:
an original, signed, uncashed winning ticket ($2 bet on Secretariat to win) of Secretariat's historic Triple Crown victory in the Belmont Stakes, in record time, 31 lengths ahead of the second place horse. The face of the ticket has been signed by Ron Turcotte, Secretariat's famous jockey of that race

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=5113075917

Robert