RZ 301 POSPÍŠIL was developed by the Czech Army Technological Institute as "Project PRZ 48" just after te II.WW, about 1946-7. As a standard equipment was approved at the end of March 1948 as RZ 301. This is a simple goniometric receiver, used for close discoverage of illegal transmitters, while weared hidden in a briefcase - mainly by the agents of Czech secret police.
The band change is performed by exchange of band plugins - unfortunately, there is only one of them (should be three) in my collection. Electrical state of the radio is unknown, but the physical state is very good, just after a basic cleaning and restoration. Unfortunately no documentation, no witness info.
See some more info about RZ 301 at Czech military historical institute