20 guage shotgun built in spain

i have recently purchased a 20 guage shotgun, i am inquiring if anyone would know when it was built and the value, it has on one barrel marked ulysses magnum and on the other barrel made in spain, side plates are engraved with a grouse looking bird, serial number is pg26568

hello ,,spanish doubles are good quality doubles and many are in the feild today ,,but values in my part of the country are fairly reasonable ,,i see them in the 200-300 range at gunshows in my aera,,mabey alittle more if extra nice condition ,,alot of these were imported by different importers as utility inexpencive feild grade shotguns and i've seen many model names,,i haven't heard of the uylesses brand name and if anyone else has please chime in here ,,
bigcurt