I can't find any listing for Davey either. I am just awaiting Nigel Brown's volume 3 on British Gunmakers so will check in that when it comes. It is not unusual to find British guns with no details as to the Maker as it is usually the vendor's name on the rib. A lot of guns were made in the general trade and ordered by small dealers and hardware goods stores and they had their name put on. The Alex Martin will most probably have started life in Birmingham and been finished by Martin's to their style and requirements. British guns are a bit of a tangled web. If you get a copy of Vintage British Shotguns by Terry Weiland there is a lot of useful information in there for the American collector although I disagree with some of his assertions about British social history. The other book I would highly recommend is Vintage Guns for the Modern Shot by Diggory Hadoke who also post in this forum as Smallbore. Both will help with your understanding. Some pictures may give clues to your guns. Close details of proof marks may well date them accurately and the address on the top rib of the Davey may help me come up with something. Welcome to the world of double guns. Lagopus.... in England.