This collet chuck came with my Abene mill - for the life of me I can't figure out what collets it uses, so I've given up and put it up for auction on e-bay - if one of you fine folks recognizes it, and tells me what collets it uses, maybe I"ll kill the auction and keep it - or, maybe not - if you can use it, it's a really nice holder in very nice condition.
here's the link. Let the speculation on what it holds begin - my best guess is B&S 21, but who knows.