Here are six wooden clamps that Jim had in his collection. They are made of oak and about 8 inches long. The spring is pretty strong so they will hold. A couple are marked HS20 W.H.SALSBURY & Co, CHICAGO ILLINOIS PAT PEND. no idea if they are lineman related but it is possible -- either way they are a cool vintage item. $5 each or take all six for $20 plus actual postage.

NOTE: I'm selling these insulators on behalf of the Jim Fielding estate -- PayPal (no fee friends and family) or checks are both accepted - I'll provide instructions. I'll also be handling all the packing and mailing