The poor quality of the ink that could be obtained at the time wore out the plates quickly. By switching to offset printing the plates lasted longer. The use of offset press would stay in place until the quality of available ink improved, which was expected to happen once world trade had gone back to normality after the disruption of WWI.

A fair quantity of this stamps printing went to the Schermack company for their type III perforated stamps (see below). Most desirable in pairs and multiples thereof.

The most desirable example of this stamp is the centreline block, shown above. The stamp came in sheets of 400 and 1,600. These sheets were separated into 4 panes of 100 or 4 panes of 400. There is a guide line between each pane and where the four panes meet, in the center, you find the centreline block. Value about $1,300 (MNH)

Shown above is a pane of 100 of plate #11260, there are four panes to a sheet of 400.
All the other plates had panes of 400 with four panes to a sheet of 1,600

Bust of George Washington
by Jean-Antoine Houdon
1785
The source of the design