Picked this up today from a retired machinist because I've never seen a h.d. USA made clamp in this style before, drill press/mill/welding table use. Armstrong Chicago no. 713 pat. Applied for. Has about 3-3/8" clearance under the screw, and is pretty beefy.
Also picked up this set of mitutoyo hecho in japan telescoping gages for a co-worker who needs a set. The case is dirty and cracked in a couple places, the gages are typical of 70s/80s mitutoyo, overbuilt and nicely made. All 6 gages are in pristine condition themselves. Dave told me he bought them new and didn't use them much.