Husqvarna M20 with back action locks, hammers and Lefaucheux under lever action in 16 or 20 bore anyone?
Seems to me I did a thread here on mine. It had a 13 bore straight rifled tube on the right and 16 smooth bore on the left.
They also came in 20x20 and 16x16.
On mine, both barrels were chambered for 16 bore cases. Originally, the straight rifled tube got a brass case with round ball and the left, a paper case with shot. I used shot in both for a modified pattern from the left bl. and open pattern from the right.
A simple restock & barrel shortening (where legal) could have changed my gun into the one Lancaster just posted above.