Luxembourg, 1935 5c-20f Intellectuals issue complete, set in mounts on special International Committee to Secure Employment for Refugee Professional Workers sheet; sheet autographed by four prominent professionals including Albert Einstein, includes 5½x8" photograph of Einstein during the signing these sheets at Gimbel Brothers, stamps o.g., lightly hinged, Very Fine and rare. Scott No. B65A-B65Q  Estimate $1,500 - 2,000. $0 (Image)