Hello Carnut
The crancase numbers indicate this is a Mayfair Deluxe 2 -stroke from 1968.
The turned-up handles indicate the 'deluxe' name.

The metal catcher is also a good indicator of age.
The carby has been replaced at some point with a G3.

The original carby would have been a G2 with a cut-out wire running up the handle.
It was common practice to change the G2s with the G3s in service.

https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=72273
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=72259

Hope this helps.
--------------------------
Jack

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