it is a great advantage to have such material! I do not have blocks of the 10c red yet, but as I said before I do have a few 2x2-blocks of the 10c chestnut. It seems that the type 2 and 3 occur haphazardly within a sheet lay-out which is not in contradiction with the setting-theory of the "tipograficas".
Growing a family-tree will tell us more!
Your dates are from August 1936 onwards as with the ones I have - a few single stamps excepted that have no dot underneath the "A". For now, it may be that both types belong to the 2nd order of the 10c red [first day: 17.12.1935; 2 printings] in "tipograficas". And NOT to the 3rd order [first day: 01.06.1936; 11 printings] in "estereotipadas" [printed reel-fed on the 1930 Goebel].
