Hello Bambi

Before I can comment, I need to know the cutting width.
I have suggested a 24" cut, but we have few images of your machine.

Could you confirm the width please.

The 1963 catalogue may be found here: -
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=71426

Quote
Would the accessory be for the transport wheels perhaps?
I don't think so.
Evidence shows that the Supercut had powered transport wheels
that required an initial factory spec - different rear axle and chaincase.

The rear brackets suggest another accessory - like a scarifier, maybe ...

Many thanks for exploring the Supercut.

-----------------------------
Jack