The story of this is as follows: My grandfather's great uncle (on my father's side) found this cane gun in 1888. He then gave it to my grandfather in 1947. My grandfather then passed it on to me around my 16th Bday, 1994. I am curious if any of you could point me towards some information on this cane, caliber, etc. Is it some silly French 12mm caliber or something? I did dry fire it once several years ago and it appears to function. Also I just wanted to throw up some images for fun.