For U.S. coil stamps a small Stickney rotary press was used. U.S. patent # 1,115,127 of 1914
For U.S. sheet and booklet stamps a large Stickney rotary press was used. U.S. patent # 1,378,386 of 1921
These presses used two paired recess engraved bent printing plates.
For coils, the plates were joined together on the side with ten stamp subjects across.
(17 x 10 = 170) for horizontal coils with vertical perforations
(10 x 15 = 150) for vertical coils with horizontal perforations
The Stickney web fed bar perforator that perforated these web fed
Stickney rotary press stamps were made to perforate at the most
10 stamp subjects across at the time.
The Stickney coiler used to cut and separate coils into rolls had
some waste at the beginning and end of the coil rolls so that a
little more than needed was cut off to compensate.
Check the following: https://www.rfrajola.com/PDR2017/Sh...Shoults2.pdf