Diamond Arms single gauge serial number 49885 what gauge is it and when was it made plus value if in fair condition?

Diamond Arms single gauge serial number 49885 what gauge is it and when was it made plus value if in fair condition?" Diamond Arms single gauge serial number 49885 what gauge is it and when was it made plus value if in fair condition?" "Diamond Arms single gauge serial number 49885 what gauge is it and when was it made plus value if in fair condition?"