Between 22 June and 27 June 1941 he claimed another nine Royal Air Force (RAF) aircraft, including five Bristol Blenheim bombers on 23 June, which brought his victory total to 40.
== Življenjepis ==Wilhelm Balthasar je od leta 1933 do leta 1935 služil v artilerijskem polku nemškega Wehrmachta, nato pa je bil s činom poročnika premeščen k Luftwaffe.