Hey guys
It is a bar blade of a lawnmaster lawnmower made by Steelfort here in New Zealand.
The blade was used on the cheaper models instead of the usual disc with flail blades.
They made the mowers for Husqvarna and Viking before Masport starting making the Viking mowers.
You can buy the blades here in NZ from most mower shops and on-line.
This shop here has them and send to Australia if that helps there are several options of blades.
http://www.sesdirect.co.nz/lawnmower-parts/blades/lawnmaster-2097422689
Just scroll down and you will see the 3 bar blades.

Hope this helps.

cheers2


"You can't beat a good old Victa 2 stroke"