As far as I know only one coding has been used for the 90-column card.
The card was still used by Remington Rand until well into the sixties
because IBM had patented the 80-column card. In the coding table
the punches have been given values (in octal) from bottom to top of
"1", "2", "4", "10", "20", "40". I have one source that mentions that
at most three punches are used, this gives the digits, the letters and
a bit of puncuation, perhaps that was the original version. This code
comes from another source, but I do not know whether it is
entirely correct. I hope somebody can give me the complete (and
correct) code. Crossed entries are (as always) undefined. There is
some reason to the placement of the digits, the rows were marked from
the uppermost but one to the bottom by: 1/2, 3/4,
5/6, 7/8 and 9. The digits 1 to 9 were punched
by a punch in the appropriate row and for even digits a 9
punch was added. Digit 0 was the uppermost row.