G'day MF,
Scott Bonnar had rotary utility type mowers in their range from the mid 1950's.

Forum historian CyberJack has some SB illustrated brochures from the 1960's and 70's available in the History Forum section at https://www.outdoorking-forum.com.au/forum/ubbthreads.php/forums/155/1/scott-bonnar-models.html

You may be able to spot it there...

Cheers,
Gadge

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