Hoping some folks can provide me with some insight into this shotgun which has been passed down to me. It belonged to my Great Great Grandfather (So I was told). I am a little bit confused. The serial number, which I believe is 1766, suggests a mfg. date of pre-1874. However, I would have expected the fore end use a keyed latch as opposed to the more modern latch I have found on this gun. Here are some photos:
https://flic.kr/p/LA71qZ
https://flic.kr/p/LA71qZ
https://flic.kr/p/LA71fi
https://flic.kr/p/27Ah7g9
https://flic.kr/p/LA71cc
Any insight would be great. If you have questions I will do my best to try and answer them. Thanks.