A New Type of EFO
Jerome V. V. Kasper & Cemil Betanov
Article published in The EFO Collector, October-December 2004.
The high-resolution images of the three aerogrammes were separated into their three primary colors.
Each separate color image was then combined with blank images of the remaining two colors to create
the "plate images" for each color. They are not identical to the original plates since
the black text printed by a 4th plate has components of all three primary colors.
As can be readily seen below, the magenta and yellow "plates" of
the mixed 6s aerogramme are the same as the corresponding "plates" for the normal 6s aerogramme.
However, the cyan "plate" of the mixed 6s aerogramme is the same as the cyan plate for the 7s aerogramme.
Careful study shows that the white plate used to print the blank shell was also taken from the 7s issue.
Regardless of the details of its production, this amazing error was created by mixing plates intended for two
different issues, three from the 6s and two from the 7s!!
Normal 6s Aerogramme
Mixed Plate 6s Aerogramme
Normal 7s Aerogramme