actually the set was issued twice.
From 1910 - 1914 5 stamps were emitted with a crown as watermark,
from 1911 on, to 1919 the same set, with additional values was sold, this time without watermark, or with parts of the words "Kungl Postverket" as watermark (rare).
set 1 : (the 1 Krona in perforation 13,5 and 13)
set 2 :
In this last set, two stamps are missing; a 55 öre (light blue) and a 80 öre (black).
Those 2 stamps were only issued 1000 times each.
If any of you happens to have a spare one of each...