I'm most interested in the way the number 4 is done on this machine. Do you know what typefaces were available for this machine?
Examples of three of the 12 typefaces are represented in the ad I posted just above. I don't know what the other 9 are. But you raise a good point, being that detailed font comparisons are likely to provide additional evidence that teh forged documents were not produced in 1972 and 1973, but sometime after 1997, and most likely, sometime in 2004.