Thanks,
Excellent info, please keep it coming. How about the pre1890 British hammer guns?  Second-tier British makers (top tier being  Purdey, Holland & Holland and Boss) like Fred Williams, Claybrough (already mentioned above), Lang, Scott, and others that could have supplied the mid-grade American market during the end of the Victorian Era, mainly before the McKinley Tariff?  
Anyone with specific info on trade names  please contribute.  A good example is that I'm still trying to confirm the English seller/maker of the F A Loomis line of shotguns.  I've confirmed around 20 models, usually with a number-letter combination such as "IXL No. 19" engraved on the sideplate. The name may have been owned by a specific importer, which would explain why there are so many models.  Claybrough, as well as Williams seem to be possible candidates.
Last edited by Ken61; 08/23/14 05:18 PM.