I was thinking for some reason, that the mount on this item I won was for the old style White mounting yoke, but it's standard Low Shank. I was also surprised in how mint looking everything appears, like virtually unused!!
http://www.ebay.com/itm/Vintage-WHIT...vip=true&rt=nc
Not shown is that the manual and metal attachment box are pinkish. It seems odd if this was used with the White 673, as that machine had a lot of bult in stitches.
It seems odd that it was used with anything OTOH, cause it's a bit on the heavy side!