My father acquired this flintlock derringer in 1978 and it passed to me upon his death. It is 40 caliber. The only identifying mark I can find is that on the side of the lock which appears to be "Assary" or "Affary". It has an engraved crest on the bottom of the grip which presumably was used for affixing a seal to documents. My web searches have turned up nothing. I don't want to sell it, would just like to know more about it's history. Any help is greatly appreciated.