Although these notes are from another Mexican state - Durango - I am not counting them towards my State set as I do have a specimen note which will fill that slot.
So why did I buy these well-circulated notes when 'quality' is a key element in any collection? A major goal in my coin collecting has always been the search for die varieties and it appears I have now suffered the same fate with banknotes.
The seller's picture just highlighted a pile of tatty banknotes however the code letters were visible for a few of the notes, MA-A was known for the issue whereas UGT was not and I couldn't resist seeing what else might be lurking there.
So having spent a few pleasant hours working out what I had the summary is:-
Of the known control letters, MA-A, LPS, ERO-, GFA etc the first two were there however OIY (vertical), UGT, ERA-, MIR, EID, L-AR (vertical), GON and ITE (vertical) were new which can now be added to the list. Another aspect that banknotes usually have that coins don't is numbers! These pretty much covered the whole issue (proposed to be 100,000 notes) running from 3033 to 96229 extending the know range quite a bit. This set of notes also confirmed that the same code letters were used for different sets of numbers (in groups of 2000?) and as a result I think also suggests the pattern for how the codes changed.
If anyone has any notes from Series E (or any of the others for that matter) it would be great to know what the numbers/codes are to see if they fit in with my proposed system or whether I have to go back to the drawing board!