With whats left of a Bragg Industries sticker on the rhs and a good match to the SMH 1973 advert my recent find has to be a close relative of irb73's purchase. Similar snorkel and throttle layout and tell tale red paint flakes on the motor mount and very similar baseplate. Motor details are KAV 73 spec no. BJ6648A , SERIAL NO. Y8 94572.
G'day gnomester Yep, I think you have done your research there.
The '73 advertisement would be a good guide as to date. Note the lack of a 'dress cowl' over the metal cowl. This started to appear late 1960s.
I can't say too much is known about Bragg Industries. They seem to have found a niche market for quality entry-level lawnmowers - and catered to small dealers too.