Harwood followed up his first round 3-under 67 with a final round 66 to show a clean pair of heals to second placegetter Gary Merrick.
Heading into the final round Harwood trailed the former Oatlands Head Professional Mike Zilko by one stroke but sealed his second win of the year with a birdie on the 17th hole to move to 7-under.
Merrick was alone in second on 5-under with David Hill third on 4-under, David Saunders fourth on 3-under and defending champion David Merriman sharing fifth on 2-under with Zilko, Peter Fowler, Brett Johnson and Allan Cooper.
The PGA Legends Tour now moves to Tasmania for the 2012 Tasmanian Senior Open Golf Championship to be held at the Kingston Beach Golf Club on January 29 and 30. Peter Fowler is the defending champion.
The Oatlands Golf Club meanwhile will now host the 2012 Bing Lee/Samsung NSW Women’s Open with leading female golfers from Australia and abroad teeing it up in the ALPG Tour sanctioned event.
The Women’s Open is on from January 27 – 29 and will include the likes of Laura Davies, Melissa Reid, teenage golfing sensation Lydia Ko, two time champion Sarah Oh, Katherine Hull, Lindsey Wright, Sarah Kemp, Joanne Mills and Kristie Smith.