Not a collector, but a shooter. I have a nice 1961 black receiver Twelvette. The only thing I would change about it is the choke. It is full and I would much prefer improved or even modified. They are neat guns.
Expat
Check with "Briley - Houston, TX".
For about $300, they will thread the barrel and you get a choice of 3 tubes with the choke of your choice.
I bought a Rem "Sportsman" in 16 gauge. The barrel S/N didn't match the reciever. Because it was choked IC and I wanted to hunt turkeys, I sent it to Briley!
I got an X-Full tube, a tube half-way between full and mod and a tube half-way between mod and IC.
Now I've got a shotgun that I really like and I can make it fit just about any situation!
Not everybody wants to alter a collectible, but if you have no intention of getting rid of the gun, why not make it as versatile as possible?