Hungarian perfin stamps - Magyar Posta security (PERForated INitialS)
A.B.Sz.R
A.G (1831) Assicurazione Generali, Budapest
DIANA
GRAEPEL HUGO
GySz Györi Szeszgyár és Finomitó, Györ (Alcohol Refinery)
JUTEFI
TORLEY
W.B.V. - Wiener Bank Verein, Budapest
Unknown
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.
and of course the well known Hungarian stamp with the 3 hole triangle.