It has a stag and boar because it was intended for driven hunts, likely in Belgium or France. Sur & Feu are French (Sur for Safety On and Feu for Fire), don't know why anyone would put Sur (South in Spanish) on a shotgun. Many Belgian makers maintained sales outlets in France.
The barrels were acid etched. Looks like later someone tried to hide the fact they were damascus and had them blackened, which has worn off over the years.
For a Belgian gun the engraving is kinda low grade, sorry. Take a look at the link to Duchateau and you will see they have always been capable of fine engraving. Drew has the dating of the proof and makers marks correct.
In the photos at least, there appears to be a nick or ding on the right barrel above the forearm. As has been stated you need to have those barrels checked. Simpson's while honest is not the most knowledgeable regarding Belgian guns. They had a Pieper canardiere in .297/300 that I told them a year ago was not meant to "repel boarders", but they never amended their description. I guess fighting pirates is more appealing than hunting ducks.
Pete
