Air Mail cover 1912 (Oct.) Regensburg Flying Days, 10pf. black affixed to reverse of special 1912 Bavaria Aero Club card (M.LP1), tied by special double-ring c.d.s. in violet, imprinted 5pf cancelled at Regensburg (11.10), also bearing additional Bavaria 5pf. and cancelled (along with Aero Club 25pf. imprint) by "FLUGPOST/MÜNCHEN" d.s. (16.10). Apparently flown twice. M. 6, DM.4000+. Photo