I've also recently bought a H.Adkin & sons, 57 high street Bedford, shotgun. Its a best quality box lock ejector with damscus barrels serial number 2007.
I've been trying to do some research with little success, I have found a little information here:
http://www.galaxy.bedfordshire.gov.u...ry_booklet.pdf
I have tried PM to "englishrose" but sadly it hasn't been read yet.
When I spoke to some people in the trade they thought it was most likely that H.adkin bought Birmingham guns and sold them as their own.
I also found a leather case on ebay by the maker, which I think had gun serial number 1211 on the trade label. I bought this for my gun and will probably restore it as its not in very good condition. If anyone knows a good restorer of leather goods, it needs a new strap and a handle as well as a repair to the ends.
Please post any more information you manage to find on the maker and I'll do the same as I find it.
Thanks
Simon