Peter Senior, 53, held his nerve in "near impossible" conditions to become the oldest Australian Open golf champion.
The Queenslander overcame gales and a three-hour delay at Sydney's Lakes course to post a dogged final-round even-par 72 to win by a shot from a valiant Brendan Jones (71).
Cameron Percy (73) finished third a further shot back.
Senior tallied four-under for the event after rounds of 75-68-69-72. His second Open victory on a drama-charged afternoon comes after his first as a 30-year-old back in 1989.
The previous oldest Open winner was the legendary Peter Thomson at 43 at Kooyonga in 1972.