Canada Scott/Unitrade 90iv, 90v, 90vi are some of the more important, interesting and overlooked Canadian stamps from 1907 because the catalogue omits some very interesting information about them.
90v are imperforate experimental intaglio printed stamps on dry pregummed paper from printing plates 31 and 32 of 200 stamp subjects each. They have a horizontal black line through them. (Plate 32 printed stamps tend to have a slightly deeper shade than plate 31 printed stamps.)
At the time, regular stamps were intaglio printed on wet paper and gummed after printing and drying .
90iv are imperforate intaglio wet printed stamps for comparison purposes from printing plate 43 of 200 stamp subjects. They have a horizontal red line through them.
The dry printed stamps are horizontally wider than the wet printed stamps due to shrinkage that occurred across the vertical paper wove after the wet paper dried.
90vi are for 90v or 90iv with gutters in between. There are around 30 pairs of these gutter stamps with 10 pairs from each of 3 printing plates. In total, there are around 200 stamps of 90v (plate 31), 200 stamps of 90v (plate 32) and 200 stamps of 90iv (plate 43)
Knowing that 90v (imperforate, gummed, type II) was made by a new different kind of printing process (dry printing) at the time helps to make it a much more interesting stamp rather than just a more expensive defaced version of 90A which is an imperforate, gummed (wet printed) type II stamp.
