There have been some beautiful knives posted here lately.
That last IXL is really nice.
Robeson made a series of knives with a rather unique bolster locking mechanism. The liners were steel and the one activating the bolster lock was tempered with a degree of springiness. A portion of the pile side bolster was cut out and the profile raised above the frame as a thumb push. When the blade was opened, the cut out portion of the bolster and part of the liner slipped in behind the blade tang, locking it in place, much like the center brass liner on a TL-29 or commercial electrician's knife.
As far as I can recall, Robeson made four single blade versions of the series. There were two English jacks, one being more slim than the other; a fisherman's knife with a scaler along the top of the blade and a cap-lifter incorporated into the underside of the tang; and a 5" toothpick. I've never seen this mechanism incorporated into a multiblade knife.
They handled the series in jigged bone and at least two patterns of celluloid. I've seen yellow composition and butter & molasses.
As interesting as the knives are, they had their faults. When the blade is open and the lock deployed, the overlying handle lies unsupported by the liner and is easily broken during use. The locking mechanism itself was prone to breakage over time. I have seen several of the knives with broken handles and/or locks.
I posted bone handled examples of the larger of the two English jacks and the fisherman's knife previously in this forum.
This past week, an Ebay seller posted this Robeson bolster lock toothpick as a twenty-four hour auction. It had eight individual bidders posting eleven total bids. I was able to acquire this knife at a bargain price.
There are several Robeson patterns that I had long since given up ever acquiring a decent example, partly because of their rarity, partly because of their high dollar value, which_I guess_ go hand in hand.
The bolster lock toothpick was one. Of the series, the toothpick is the rarest knife. I think I have seen only two in all my years of collecting. One of them had a broken and missing lock mechanism.
This knife is in excellent condition. It has been used and sharpened, but the blade is nearly full. The old Robeson jigged green bone is gorgeous in the extreme.
The pattern number is 616611. The knife is 5" long, closed.