http://www.ebay.com/itm/antiqu-rare-1865-mini-6in1-hammer-wrench-sq-drive-screwdriver-nailpull-multitool-/160782382299?pt=LH_DefaultDomain_0&hash=item256f6074db

Probably not as rare as I thought when there are two on Ebay.

http://www.ebay.com/itm/Vintage-B-Boardman-Wrench-PATD-MAY-30-65-JULY-10-66-/300692136756?pt=LH_DefaultDomain_0&hash=item4602a5e334

There are several sizes of them, 6 inch and I think the first listing you listed is the 4 1/2 inch. the small ones are harder to come by and usually bring a higher price. Often found with the small pipe jaw swivel jaw missing.