That’s a nice one. It is the original sheath. I’d leave it alone. The other stamps on it didn’t come from the shop, it was done later. It was made by Bob.
All Morseths are great knives. I know there are only collectors that want the earlier stuff, nothing after AG bought them because they think they were mass produced. They weren't, my buddy owns a gun shop that used to be AG Russell's place, the little building out front was where they were made. Bob had guys that worked for him over the years, Keith Murr, Tom Krien, Dan Crotts, and I'm sure there were others, but they were all handmade. From what I have read about Harry Morseth, he was a genius with making machines and tools to make the knife making process easier and quicker, Bob is exactly the same. He is as good a knife maker as there has ever been, but he is a better machine and tool maker. I am partial since he is my friend, but I love the handle shapes and the blade shapes and finish from the last era of the company (88-97). There are some beautiful knives and handles that came out of that period.
As for the period your knife was made, see my pic below. Here’s what I have determined:
The top stamp is early, possibly made in Washington after the acquisition. The stamp is on the “show” side and they used the old Morseth stamp. By the way, I think this stamp is in Bob’s leather room right now.
The second one is the stamp AG had made when they came to Arkansas, spring of 71. I think it’s the same stamp as yours but with the damage to the “R”. I have one of those pictured next.
The book says the next stamp was made in 1975, which is when Bob left Arkansas for 13 years (the book says that is when Bob started making them but it is incorrect). This is when Lloyd Hale started making them.
The last stamp is hard to see, but it is from when Bob came back in 1988, they all had the years on them after his return so you’ll find 1988-1997 stamps.
Somethjng interesting if you are a Tom Krein collector, the ones from 1993-1995 were likely made by Tom or Bob or Dan Crotts, those were the guys working in the shop then.
Hope this helps.
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