Signed Commemorative Envelope.
Brown was an American ace who downed six enemy aircraft in 57 missions in his P-51 Mustang; Knoke was a Knight's Cross recipient, a German Luftwaffe ace who, in more than 2000 missions, claimed 33 downed aircraft and another 19 unconfirmed kills, penning the 1953 Luftwaffe classic "I Flew for..... More