MUSEUM OF ARTILLERY
ENGINEERS AND SIGNAL TROOPS

From left to right - 76 mm Field Gun M 1933 (F-19); 76 mm Field Gun M 1936 (F-22); 76 mm Field Gun M 1939 (F-22 USV); 122 mm Howitzer M 1938 (M-30); 152 mm Howitzer M 1938 (M-10) - Thanks to Neil Thomas for the identification.