What time era is the pardner model sb1 12 gauge 3 mod from?

I visit the pawn shops regularly. I boght have bought 2, one in the 12 and one in a 20 gauge. I gave $69 for one and $55 for the other. If you have one but dont like the 12 gauge. Go to H&R website and look at the other barrels options you can purchase. As of last year you can buy a .357 .44 or an ultra slug barrel in a 20 gauge a great gun with a bull barrel. If you want more info. Go to go2gbo.co com that is. They can tell you all you want to know about the NEF H&R guns. Hope this answeres your question.