Try e-gunparts.com
The proof markings on the gun indicate it was made by Armas Marixa. These shotguns were made in the 1970's. As i find more i will add to this post. Mine is marked Memphis. It is 12 gauge with a three inch chamber.
Twelve Gauge Records was created in 2005.
Can't answer about "Volunteer" question. Please tell which model. Volunteer is not a model by Browning
Size of the bore.
Try gun shop, gun shows, garage sales, want ads, e-gunparts.com
Shock Value - Twelve Gauge Valentine album - was created on 2006-10-03.
A 410 gauge, single barrel shotgun with Volunteer stamped on it and Serial number A981277 was made by the Volunteer Arms Company. They made guns for Belknap Hardware store in Louisville, Kentucky.
You will have to specify which load.
1954
50-100 dollars
what do you want for it
Unknown.