It's a reasonably common cabinet, I have the seen similar with one drawer on each side, and a single drawer. I think yours is treadle cabinet No.2, they are very stable and nice running when oiled. There are a few versions of the drawer fronts, flat, rounded sides, more or less embellished. Some cabinets have a sort of drawer in the middle that tips out, others just a solid pice of wood. You have to do a bit of catalog resarch on the web and see if you can find something spot on. Model 127 came in No.2 at least.
I guess very few model 66 with the stitch length lever came as treadle, I have seen a few of the earlier version with stitch length turn knob; treadle cabinet and spoked hand wheel. If you plan to keep the arrangement a leather belt is nicer than the plastic tubing.
Last edited by Mickey2; 04-30-2018 at 01:31 PM.