Here's what I think I know, so far: Fabrique Nationale B25 B1 12 GA, 1977 MFR. Serial Number 8K3RR65xxx. I am curious what the 8K3 prefix means. 2-3/4" chambers. Barrel 30". 7 lbs. 12 oz. LOP 14-3/8", DOC 1 3/8", DOH 1 5/8", cast neutral. Fixed chokes (Marked Full/Full, measures 0.016/0.027). Single selective "Olympic" (Mechanical not Inertia) trigger. Rose and scroll engraved on a coin receiver. 1/2" wide ventilated rib. Not sure what to call this as the Broadway rib is typically shown as 5/8".
From another forum: "'8K3' is an FN product code for their Special Trap #6 model which has 30" barrels with a 12mm rib..."
Yeah, it's pretty nice. The listing I got it from said it was French walnut, I'm not sure of that...but I'm far from an expert.
I had B3 same year and vintage with that prefix. It had same floral theme but much finer along with the rare medium rib think it was 13mm. Mine had a silver trigger but in different style. Dark featured wood with figure.
