This is a resin detail parts set for use with military vehicle kits.
From the manufacturer:
Poland was attacked by Nazi Germany in September 1939 and this invasion sparked the start of WWII. The destruction caused by this and the later Soviet counter offensives during 1944 and 1945 meant that many important buildings were ruined. This bank building typifies this destruction.
This unpainted resin model measures230mm x 140mm with a height of 135mm.