Quad Plate printing.
In nearly all cases, stamps were printed in a quad plate printing
forme (as illustrated). Sets of four plates were created to achieve this. As they wore
out, they were replaced in-toto, with another set of four plates.
The millsheets supplied were square on, 1 yard x 1 yard (36
inches). They were cut down to half size 36 inches x 18 inches and used as printsheets for
these quad printing forms.
A stamp size inter sheet gutter existed between each pane of
The printsheet was comb perforated in situ after printing
and gumming, then guillotined appropriately before issuing to the post office.
Again, with a few exceptions, no jubilee lines exist.