Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Colombia - 1919, Experimental Flight from Barranquilla to Puerto Colombia, black overprint on 2c carmine rose, large part of OG, VF and rare, only 260 stamps were overprinted and no more then 49 remained uncancelled, E. Kessler guarantee hs, Colomphil certificate, C.v. $3,500, Est. $1,600-$2,400, Sc. #C1