[GreenKeys] Western Union manuals for a 2-B aka 14

[Jim Haynes]

So far as I know the Teletype typing reperforators all use 11/16" standard
perforator tape, use chadless punching, and that allows printing on the
tape.  Western Union and Kleinschmidt had some of their own designs that
used 7/8" tape and printed on the edge of the tape where there were no
holes.  With Teletype the printing is 6 characters behind the punching,
or is it 6 characters ahead of the punching?  anyway there is a mark on 
the tape reader gate showing where to read the tape when the holes are 
over the pins.

Late Teletype stuff using printing between the feed holes sometimes.