Well it finally happened.

[Mr. 16 gauge]

I had one that I bought back in the late 80's that I got for less than $100....thing shot a group that I could cover with a dime. Problem was, it was 9" high at 100 yards, and I couldn't make the sights go any lower. That, and the fact that ammo (Norma) was $56/20 rds caused me to sell the rifle......and I always kicked myself for doing that.

Later, in the early 90s I bought one from a guy that was going out of business.....had a table full of 'em at a gun show, so I picked the one with the best looking bore. Sporterized it (no, I have no regrets), and it has made a great hunting rifle ever since.....and ammo is more plentiful and cheaper now.
Doesn't shoot as accurately as the first one, but it is still quite accurate. Date on the rifle was 1909.
The threaded muzzle (I was told) was for a grenade adaptor......it was used with blank cartridges. There was someone out there who was selling 'caps' that screwed on to the threads to give it a bit better appeal.
That's my 2 cents, FWIW.........