What is this 12 gauge side by shotgun made eibar Spain worth it has the name antonio bilsatua marca registada also seter on barrels which appear to have a dog engraved over the?

It sounds like you have a very interesting shotgun! Here's a breakdown of what we know and what we can deduce from your description, along with some steps to help you learn more about its value and history:

What We Know:

* Manufacturer: Antonio Bilsatua, Eibar, Spain

* Gauge: 12 gauge

* Type: Side-by-side shotgun

* Barrel Markings: "Antonio Bilsatua Marca Registrada" and likely a dog engraved over the serial number on the barrels.

What We Can Deduce:

* Eibar, Spain: Eibar is a town in Spain known for its long history of gun making. Many fine shotguns were manufactured there, and a shotgun from Eibar could be quite valuable depending on its age, condition, and maker.

* Antonio Bilsatua: This maker was known for producing good quality, mid-range shotguns. The "Marca Registrada" inscription means "Registered Trademark."

* Dog Engraving: Dog engravings were popular on sporting shotguns in the past, and this detail could add to the shotgun's historical value.

How to Learn More:

1. Get a Professional Appraisal: The best way to determine the true value of your shotgun is to get it professionally appraised by a gun expert. They can examine it closely, assess its condition, and research its history.

2. Look for Serial Numbers: Check for serial numbers on the shotgun and any other markings. This information can help track down more information about its production date and history.

3. Research Online: Use online resources like gun forums, auction sites, and vintage shotgun websites to see if you can find similar models made by Antonio Bilsatua. You can use keywords like "Antonio Bilsatua shotgun," "Eibar shotgun," or "Spanish shotgun" in your searches.

4. Contact a Gun Dealer: A reputable gun dealer who specializes in vintage shotguns might be able to provide information about your shotgun and its value.

Important Notes:

* Safety: Before handling any firearm, always treat it as if it's loaded. Follow all safe gun handling practices.

* Ownership Laws: Be aware of the laws regarding ownership and transfer of firearms in your area.

By taking these steps, you can learn more about the history and value of your Antonio Bilsatua shotgun. Good luck!