Linen postcard with colorized image of the front entrance to the Crystal Cave attraction near Spring Valley, Wisconsin. Date from postmark: Jul 25, 1961; mailed from Akaley, Minn.; purple 3¢ Liberty stamp (Scott 1035). Printed on verso: "Genuine Curteich - Chicago 'C.T. Art-Colortone' Post Card (Reg. U.S. Pat. Off.)." Message: Addressed to Mrs. F. Keifer, 11 Forest St., Livingston, N.J. "Hi Ma, We went for a short ride and the car kept going west. Be back soon, Herm."