Share 'Crestworth Crystalite Fibre Optic Lamp'

Hi all, posting on behalf of my dad who has recently bought a Crestworth Crystalite fibre optic lamp. It has an unusual mechanism which flicks the colour wheel around rather than gradually spinning it. Unfortunately the mechanism appears to have been broken over the years and parts appear to have rusted off and gone missing. Does anyone have any pictures of a working mechanism? I’ve uploaded som…