Checking through what I have it seems likely that Greeners have the book with your serial number in. Some Needham books were lost but I think you will be in luck with 1830. Nice; no, very nice, example. English singles are not as common as you may think. I would suspect it is black powder proof unless later proofed for nitro. They are usually quite thick at the breech being a single and usually pass without a hitch. I should just seek advice on yours from a respectable gunsmith. Just to give some idea. I had a single 16 bore BP proof gun that had been re-chambered to 12 bore and re-proofed for nitro. They are usually stronger than doubles. Lagopus.....
