Sale No: 380
Lot No:1830
Symbol:Ungeb
Cat No:Michel 183K,185K
1925, overprint AEREO CORREO 5c. and 20 c. with overprint inverted, unused with large part original gum, fine and rare, just 12 resp. 36 copies printed (Scott C2a, C6a)
Sale No: 380
Lot No:1831
Symbol:Ungeb
Cat No:Michel 244b var.
1930, airmail, Herrera 5c. on 10c. , surcharge in yellow, horizontal pair, one with '1903' instead '1930', unused o.g., very fine and rare, just 50 copies printed, the variety being unique (Scott C21 var.)
Sale No: 380
Lot No:1832
Symbol:Ungeb
Cat No:Michel 245 var.
1930, airmail, Herrera 5c. on 20c. , surcharge in blue, reading downwards, horizontal pair, one with '1903' instead '1930', unused o.g., very fine and rare (Scott C22 var.)