My wife recently inherited a shotgun that I don't know anything about except being a .410. Stamped on the barrel is Zabala HNOS. S.R.C. - Eibar or Eibak - made in spain. It was imported by J.L. Galef & son, inc new york, new york. The gauge is not even on the barrel or any other place, not sure when that became a requirement but this definitely doesn't have that. Any help or pointing in the right direction would be greatly appreciated. This is a side by side and the action is parkerized with some simple scroll work around the edges of the action.