Jack O'Conner the well known gunman from the mid 20th century loved the Eusebio's (except the single trigger ones...he had to have them worked on but still a beautiful gun)
Most go for 200.00 to 2000.00 depending on the detail work, side clips, wood grain, engraving, side lock vs box. Side locks bring more money.
Almost all of these guns are great field hunting weapons....very reliable. (the single trigger guns could fire both barrels on one pull....an easy fix for a gunsmith)
You can fire 2 and 3/4 inch shells in a shotgun chambered for 3 inch shells. There is no 3 and 3/4 inch shell made.
About 100 USD