Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Colombia - 1923, ''Bo'' overprints on 5c-5p and over red ''R'' on 20c for Bolivian Air Post correspondences, complete set of 12, usual dry gum, LH or hinged, mostly VF and scarce, only 50 complete sets possible, each stamp with E. Kessler or Sanabria guarantee hs, C.v. $492.50, Est. $250 -$300, Sc. #CLBO1-11, CFLBO1