The stamps were printed in sheets of 20o, and, when perforated, the middle of the sheet was left unperforated.
Thirteen plainware, one redware, and one Trincheras Purple-on-red constituted the unperforated specimens.
While the number of emulsions in unperforated film were limited, the selection of emulsions for standard 35 mm is not.
The movie has a plot that would make Swiss cheese seem unperforated.
In a few hours, I'm off to have several needles inserted in my currently unperforated arms, so some sleepy little diseases can have a party with my immune system.