There are a few 120 sized Ektachrome transparancies up for auction on Ebay that depict Frisco action at the St. Louis Union Station: http://cgi.ebay.com/Frisco-Steam-12...435?pt=LH_DefaultDomain_0&hash=item35af2640c3 http://cgi.ebay.com/Frisco-Texas-Sp...770?pt=LH_DefaultDomain_0&hash=item35af264dca http://cgi.ebay.com/Frisco-Office-c...480?pt=LH_DefaultDomain_0&hash=item35af265478 They appear to be from the late '40's or early '50's. Rich