Hi Shedpest, You're right there mate, what a ripper! Congrats on a great score... grin
What you have there is a Scott Bonnar Model 16 "Queen" that were manufactured in Adelaide, introduced in 1950 in 20" and 24" cutting widths, you will have to measure to see which one you have. wink
Are you going to restore it and did it come with its catcher? Here is an advert from an early Scott Bonnar brochure... [Linked Image]
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin