My friend Alejandro Zapata in Badajoz Spain recently acquired a few old guns. The first of which is an old shotgun inherited from his grandfather. He knows little to nothing about it. I have asked for further detailed photos of the breech markings to possibly help figure out what it is.
As he is a police officer in Spain, guns often come his way from friends and family seeking to dispose of firearms. He has amassed a nice collection. An other recent acquisition of his is this little Star DKL in 9mm short (.380 ACP) a gift from a friend.