Hello Bambi

Your images explain the situation.
That's a great image of a Ballarat nameplate.

This looks like the largest 24" machine.
I guess this must be an early 1960s SB Super Cut.

The 'RG' means this had a reverse gear, given the rotation
needed to be reversed to give clockwise reel rotation.

The rear main-frame plates indicate an accessory was fitted.

What a great machine!
Please keep us informed!

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Jack