World War II
The 10.5 cm hrubý kanón vz. 35 (Heavy Gun model 35) was a Czech field gun used in the Second World War. Those weapons captured after the German occupation of Czechoslovakia in March 1939 were taken into Wehrmacht service as the 10.5 cm K 35(t). Former Yugoslav guns were designated as the 10.5 cm Kanone 339(j). It was used by a variety of German units during World War II, especially on coastal defense duties. 36 were in service with the Slovak Army.
10.5 cm hruby kanon vz. 35 Wikipedia
It was designed solely for motor traction. It fired 18-kilogram (40 lb) HE, canister and semi-armor-piercing shells.