Where can you find information about a Sears Ted Williams Model 300 number 2342500 automatic shotgun?

Sears Ted Williams 300 Guage: 12 and 20 Action: semi-automatic, gas operated; hammerless Magazine: 3 shot tubular Barrel: 27"adjustable choke; 28" modified or full chokes; ventilated rib Finish: Blued; checkered walnut pistol grip stock and forearm; recoil pad Approximate wt: 7 lbs Estimated value: Excellent NIB: $325 VG: $$250 Attic condition: ?? note: variable choke desireable, add a few bucks