The 2 pesos in 1936 was a high value paying registration air mail rates. By the mid 1950s, the 2 pesos was a letter rate air mail definitive. The 1L6 paper was used on the stamps of this issue that were still in use in 1956/57. The paper is porous and has a grid similar to that of the 1E1 and the 1E3a. This stamp was printed in large quantities. I find a wide range of colors and plate wear.
Light blue, probably from worn out plates.
Dark blue center.
Very dark blue center with some over-inking.