The portrait issues were derived directly from the KGV recess series of 1913. T.S. Harrison obviously resurrected his original layout, size and format from that aborted series. The majority of these stamps follow that layout of a single pane, 12 rows of 10 on unwatermarked paper, line perf 11.
Subsequent to the issue of the 1927 Canberra, it was standard practice to include both plate numbers and imprints on the post office sheets. This practice only really occurs on the Sturt Commemoratives, solely because there are so few designs in this format to indicate the general policy.
Because nearly each stamp in this chapter has exceptions to the general rule, the following details the relevant areas.
It can probably be seen here that the print method employed dictated the paper and perf, and consequently the layout.