and of course the well known Hungarian stamp with the 3
hole triangle.

During 1921-1924 various stamps were punched with three holes
forming a triangle. These were sold at post offices and collectors and dealers
who wanted them unpunched would have to purchase them through the philatelic
agencies at a 10% advance over the face value.
Wanted more perfins,
if you have some please E-mail me.
I'm also looking for information/documentation or catalogues about Hungarian
perfins.