You are looking on one 5 1/2" by 3 1/2" Postcard. This card is in good condition and has never been postally used. The inscription on the back reads "P. F. 32 The Twin Sisters (in Second Forest) Petrified Forest, Arizona, These prostrate logs are known as the Twin Sisters due to their similarity in size and coloring. The Second forest is noted for the minute detail and grain of the wood, readily seen under the microscope, and in many cases with the naked eye".This card is a C.T. Art Colortone De Luxe by Curt Teich and Co., Chicago. Add this one to your collection now. buy Early and buy Often. Thanks for Looking.Powered by eCRATER