Nice pictures, thanks for posting them!

Before we get locked down for posting these awful pump guns,,here's another to add to the list of those made specificly for a gauge other than 12.

Stevens Model 200,,in 20ga and 3inch chamber (only) no less.
Short lived, very low production and a mystery to most.
But they aren't all that complicated inside. Very strong lock-up.
Not nearly the fine looks of the 17,,but it's different,,I like it. Shoots well. But it never saw any 3" ammo from me.
1911/14 time period,,somewhere in there.