I investigated areas like micrometers, pulleys, propellers (this really looks like something that spins to me - clearly an assembly, of course), zeroing in on the 2x4 brick with a special underside and the red knob with no success. :-( Sorry, @vegitt, I gave it a try!!!
It is the base to the LEGO stop motion camera kit. We have it somewhere, but I can't find it at the moment to get you the set number. Images come up if you type it into Google. Hope that helps
Thanks @brixalotl that's the one. However it would seem as though somehow it was not an official set with a number, but a partnership Lego did with Digital Blue at some point (at least that's what I can find out). I don't think ill go to the effort of listing it for sale, probably not much interest in it.
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Niek.