hi, Wallace how did you date the lathe? I have one machine no rs585 test no 18559 which looks older than yours. the top of the headstock is curved and the name is cast under the top window, the only other difference I can see is the top pulley which has no grub screws. I have had every nut & bolt to bits on this lathe and also fitted an indexing arrangement and painted it wadkin green. I don't think I am too far away from you in Bd Castle ? keep up the good work regards Stan