I am not sure that I have seen or herd one in 69 cal. most of his that we are talking about were, 75 cal. ones that take a .715 to 725, cal. dia. RB. with or with out a patch, if you use paper wasp or white faced hornet nest for wadding. as stated his were in weight, approx. 4 1/2 lbs. very light and as the the guys are saying kicked like a mule! and a wide flat brass butt plate held on with iron nails, a very long well defined serpent, light ram rod thimbles with rings on them. butt is sorts squared and very broad, not rounded. it has a beaver tail behind the tang. these are just some of the traights that the 12 smooth bored ones have. hope this answers some of your thoughts on what you have. a picture of it will confirm it. as stated most of what he made were 20 bore guns.