There is good info to help sort AyA models on the Swedish site, including catalogue pictures - shotguns.se
The Model 106 is one model up from the base Iberia II.
I would value a 16 gauge above a 12 gauge and a 20 gauge above that.
I have a 16 gauge Model 106 which is a serviceable boxlock non-ejector gun.
Sears number does not correspond to AyA number system.
AyA Fine Guns, via email, has been good about looking up model from serial number in their records. In the current pandemic, that may not be.