Swiss series of 90mm anti-tank guns that used the high-low pressure system invented by the Germans in World War Two.
Fotress versions of both models of the gun existed as well and replaced 47mm guns previously used in the fortifications.
VARIANTS OF THE SERIES
9cm Panzerabwehrkanone 1950 - Original production version 9cm Panzerabwehrkanone 1957 - Modernised version.
