Thread: Vintage Rolls Razor England

Will someone please educate me as to what this is and how it works. If you know of a video I would prefer that but if one doesn't exist, a well-worded explaination will do.
There are currently several of them on eBay and before I purchase one for either myself or to give to a local barber/ beautician for her collection, I would like to know how to use the crazy thing. I would also like to know what to look for to ensure I do not buy an eBay turd.
Thank you for your support.