Its a clone of a thing called a Deckel S0, if I understood the story correctly Mr Alexander used to work for Deckel and bought the designs when Deckel packed in making this model. Its actually an engraving tool sharpener/ grinder, but makes a good end mill grinder etc. The history is on the web. Anyway the collets are USUALLY ( but not guaranteed) type U2 collets avaialble from Vertex via Rotagrip or Chronos. I found the Deckel one in a junk shop in Buxton, but without the collets so you did well. User manual etc all on the net, but you need to used Deckel soemtimes and Alexander othertimes just to search for what is there.
Either model is well made, solid and useful, and they seem to make good prices on Ebay. One sold recently, if you search completed listings you'll find it. Very definitely worth restoring this one, even if you sell it on for someone else to play with. Anyone looking to buy this won't be fazed by the odd motor mounting, it juat adds to ots character
Hth Simon
Edited By Simon Williams 3 on 02/02/2017 15:40:01