United States Collections - United States, Airmail, Flight & Zeppelin Cover Assortment, 1931-1941, group of twelve covers, including 1931 R.E. Byrd autographed cover with "Peoria Welcomes Visit of/ Rear Admiral P.E. Byrd/ Apr. 30, 1931" handstamp; two 1936 Hindenburg first North American Return flight covers with clear flight cachets; 1941 southern route set of nine covers (AAMC FAM 18-20, 18-21, 18-22, 18-22a, 18-22b, 18-22c, 18-23, 18-23a & 18-23b), Very Fine. Suggested Bid $200.