I've looked at the three B&S mentioning Ken Cope books (Catalog collection, Lathe Builders, Milling Machines) and they show legs "similar" but not precisely in this pattern. Most don't seem to have enough room for the name imprint above the "acorn hole", nor is their acorn hole precisely the same shape.
A "Nut tapping machine" shows a little more than most of the "end view." The legs in all views show a more graceful curve between top & bottom.
Agreed though, the Turret Screw Machine seems "closest" to the Ebay seller.
And the Ebay seller is correct in his estimation of "early."
I think "Honrick" is no longer with us? He was the "go-to" for all things Brown & Sharpe.
"When someone dies, a library closes."
Joe in NH