Hi all. I have a Winchester 37A single shot 16 gauge full choke. It is in excellent condition. I'd say at least 90-95%. The serial # is C1056xxx and it is stamped on the receiver and on the barrel (the numbers match). It has a 30" plain barrel and a checkered stock and forearm. Also it has a "gold" trigger. Can someone tell me the age and value of this gun please. And also....why the "gold" trigger? Thank you for your time!