(9) diff Century of Progress 50¢ Zepp covers, incl Chicago-Akron, Chicago-Germany, Akron-Chicago, Akron-Akron, Miami-Chicago (2, one is FDC), Germany-Brazil FDC, NYC FDC w/ 4-line handstamp cachet, NYC FDC w/ GPO duplex; bonus item: 1928 PPC w/ photo of Amerikaflug mailed from Switz to Oregon; gen F-VF (Image)

Est. $500-600 LE