1506100 United States Covers. CAM Flight Cover. CAM 28 (1929), AAMC #28E3.
9556.
CAM Flight Cover. CAM 28 (1929), AAMC #28E3.
CAM Flight Cover. CAM 28 (1929), AAMC #28E3. May 1, 1929 flight cover from Omaha, NE to Washington DC. Black flight cachet on blue entire. Sc 551 (block of six)) on 2c PSE. Hammelman cover, no b/s.
Very Fine