They were 37MM cannon with Wolfram core anti-tank shells. This one has exhaust covers for night flying. Germany's most decorated serviceman, Heinz Ulrich Rudel flew the standard Ju87B/Ds and these Ju87Gs to glory over Russia, and he lost a leg doing it. He continued to fly after his leg was amputated. He died within the last 10 - 15 years or so.