Hauptmann Wilhelm "Wim" Johnen. On the night of 27/28 April, 1944
Johnen shot down a RAF Lancaster four-engine bomber. 
He and his crew then made contact with another over 
Lake Constance heading west for Switzerland. Johnen 
attacked the Lancaster but his Bf110 G4 (WrkN740055) 
Stkz-(C9+EN) received hits in the encounter and with 
a dead engine Johnen was obliged to land at the 
Swiss airfield at Zürich-Dubendorf. Johnen and 
his crew, Observer Lt. Joachim Kamprath
& Gunner/Radio Operator Obfw. Paul Mahle
were interned only to be repatriated some days later.