Thanks, under the barrel it has several proof marks, the serial No. 135580
what looks to be 1420 MCE but the letters are very feint. 183 with what apears to be a kind of X but almost looks like crossed rifles
900 KCS
choke 17.3 & 18.5 under both barrels42 - 70 inside an oval
Fca Aguirre Y Aranzaral Made in Spain on top of one barrel
Ravell Barcelona on the other
it has a single trigger with a gold selector button and the "S" for safety is inlaid gold