1512700 United States Covers Airmail (Scott c11). 26 Airmail Cacheted Covers.

 

1928-1930 Grouping of 26 Airmail Cacheted Covers Showing Various Plate Positions of C11., Interesting assortment of First Flight and other Airmail cacheted covers showing usage of C11 in its various plate positions. Generally excellent condition throughout., Very Fine.