Hi Spencer,
I have a Mellor Lathe, not entirely sure how much of it is original, as a few things don't quite match with what lathes.co.uk say it should have – 3 speed V belt (may/may not be factory), 2MT tailstock (probably replaced with one from a different lathe), now has 3MT headstock (I rebored it from the random taper that it did have), definitely has the wrong banjo, many change gears missing.
Happy to answer any questions that I can.
Tim