Okay... Let me add a few pages of Colombia airmail stamps from my collection. A lot of the early SCADTA issues, I have had to add one stamp at a time as I find them (and find some extra disposable income ).
Since Scott began listing the early Colombia airmails just a couple years ago, the prices have begun to climb steeply. Some of the relatively less expensive stamps of Colombia I still have a difficult time locating. Scott #C96-C110 in mint condition still escape me.
For anyone interested in the early airmail history of Colombia I would highly recommend the book "The Air Post of Colombia" by F.W. Kessler. I have a copy if anyone is interested.
Not an area I collect but some years ago a collector I know sent me pictures of an auction he won. Although not as expensive as the overprinted ones in an earlier post, they are very difficult to find as a full set.
The labels were produced for private advertising for the Curtiss Aeroplane Co. and feature the Curtiss JN in various scenes. Nine of the labels, without selvage, were overprinted by the Compania Colombiana de Navegacion Aerea (SCADTA) under contract with the Colombian Government, for use as Air Post stamps
There is a note that the 1st one with the clouds and small biplane is only 1 of 3 known that were not overprinted
Los Primeros Cincuenta Años de Correo Aereo en Colombia Eugenio Gebauer y Jairo Londoño T. (Spanish and English)
The Air Post of Colombia Eugenio Gebauer (English)
It took me about 4 years to find a mint set of C96-110. I always found one or two items but not the whole thing. One day I saw that Regency had a set and I called them. I made arrangements to buy the set before it went into auction.
Interestingly Ad Postal made a set of FDC's for the CCNA stamps on the anniversary of CCNA(??). I was able to purchase a set of FDC's except for one.