The thread size isn't mentioned but if the faceplate is 7.5 then it could be 1.5x8. Looks like an adapter plat as well.
Assortment of Vices and & 7 1/2 inch lathe face plate - tools - by...
For Sale is an assortment of Vices and face plates for a lathe, some new some used. all in good working condition. starting at $50 and up. I am trying to update photo's as pieces sell. Please call...
vancouver.craigslist.org