I have a line on a King Nitro Model 812 Single Shot 12 Gauge Shotgun with an octagon barrell. I can't seem to find much information about this weapon. It has been nickeled and is very ornate. No serial number that I can find. I have been told that these weapons were made for Sears by several different manufacturers. Can anyone give me any info or maybe give me an approximate value for this weapon. Thanks, Joe F. Watson Wanna kill these ads? We can help!