Lot 61638 – 1920 50c pale green, unique « GM » trial overprint

1920 50c pale green, « GM » signature by Gonzalo Mejía on marginal example with o.g., the signature applied in black contrasting with the issued colour in red, prepared for the issue of consular stamps designated to the United States and which were sold in New York, vertical crease of no importance; the unique signature trial overprint on 50c, with two additional trials on 30c, and this being the only known exhibiting the initials only and furthermore executed as inverted, a gem for the advanced collection of Colombian airmails; cert. Bortfeldt (2008); ex SCADTA archive.