I don't think any are currently manufactured, that is PC types. There is a legend George Washington lost a Barlow the night they crossed the Delaware River.
Dang.
There are some drawings of Barlow PENKNIVES in Smith's 1816 Key (it was a tool catalog) but that really doesn't help much.
Bernard Levine, "The World's Greatest Knife Expert"- just ask him :grin: Posted some old pc Barlows. I'll try to describe as best I can.
The Bolsters were integral, not rivets or soldered to liners. The liner part is thicker than on a modern knife and the bolster was sloped. So if you started in front at a 1/16" thickness that then increases rearward to 1/8 or 5/64 to the scale and then immediately drops back to 1/16" in the liner area. Should be iron but mild steel is okay.
The pen knives back then had clip point blades but all the others had rounded- like on a Boy Scout knife.
The kick was square and narrow- no real ricasso area- not enough room for a stamp mark. The nail nick was stamped and semi circular, not ground. On a ground nick the nick is flat across the top and rounded on the bottom.
The scales were bone and often had skip line checkering- actually, check out George Newmann's Swords & Blades of the American Revolution- I think there is a Barlow with skip lined bone scales.
On the stamp- it probably should be horizontal on the blade, BARLOW. I don't think there was any trademark like a cross or peppercorns or crossed keys.