Adam.after my previous post I googled "FIDDIAN" and found several references some from British arms forums, nothing on Fiddian as gunsmith and didn't go too far but one mention of Fiddian name as connected with an occupation possibly allied {my guess} with lock manufacture.I suggest further googling of this name but I still think this name is connected with lock making probably located in Birmingham,England,a very likely possibility. :hmm:
Tom Patton
Tom Patton