“Austrian” single flash-hole Berdan primer…Georg Roth Patent design.
Made reloading of the Berdan case easy (fine decapping pin to drive out the spent primer, and easier to manufacture as well ( single drilled central (small) hole). When this Berdan system was designed, a lot of European Armies still reloaded their own gallery and training ammo.
Countries which adopted the Roth system for primer Pockets are:
Romania and The Netherlands ( 6,5x53R);
Portugal 8x60R Kropatschek and then both 6,5x53R and some 6,5x58P; .303 ( from 1922 to 1936…went "normal Berdan ( twin hole) with introduction of RWS machinery in 1937 and adoption of 7,9 as the standard calibre).
Czechoslovakia: 8x50R (Local use and export) 7,9mm until German occupation; several other contract calibres ( 7x57 and 7,65x53, .303 etc).
Hungary :8x50R till adoption of 8x56R (31M);
Greece 6,5x54MS ammo ( Austrian and Gmade; adopted twin system with manufacture of 7,9mm ( 1930s);
Austria maintaned the system until they adopted the 8x56R M30 ( twin flash holes).
I have a custom made die set for reloading my Czech 1935 8x50R (Bulgarian contract) cases. Same die design as normal boxer, with very fine ( about 1mm diameter) pin in shank & expander plug. Works a dream. I also made a Hand Pin using spring wire ( 1mm) and .250 rod to handle all other “Roth” cases.
Another thing to note, is that the Roth system primer cup is usually .199 diameter ( 5mm), a size only available today as a “Pistol” primer or as a “Cattle Killer” cartridge primer. The Czechs kept making the .199 primer for use in their 7,62x45 Vz50 cartridge, as did the Russians in a lot of their 7,62x25 Pistol cartridges.