On 12-23-14 I asked this forum what they thought about this shotgun, did a little research on shotgunworld & Yahoo Spanish Forums. It may be a model 66-XXV, Kyrie and most of you guys will know much more than I. Apparently Grososbel made all grades of shotguns, supplied the British trade with barrels & locks, also supplied Gunmark with the Sabel line, closed in the 80s. Here was the link:
http://www.gunsinternational.com/PEDRO-G...un_id=100507214

Hunt with vintage classics.
The right of the people to keep & bear arms shall not be infringed.