3x5.5x1-1/8” deep two-piece box. Box lid shows Century of Progress logo in upper left. Text includes “Keystone Third Dimension Photographs And Stereoscope/Official Photographer Kaufman-Fabry/Mfd. By Keystone View Co. Meadville, Penna.” Trace of lt. wear. Box remains sturdy and all corners intact. Box Fine. Metal fold-out viewer opens to 4.5x5x2.75” when fully extended. Trace of oxidation on some metal hardware, o/w viewer is VF. Comes with sixteen 2.5x4.75” real photo stereo views. Each is numbered and captioned below. Included are numbers 1 through 6 and 15 through 26. Five of the outdoor views show the Goodyear blimp in the sky. Cards are clear, glossy and N. Mint. Unusual. First we’ve seen of this particular style in our 43 years.