A farmer gave it to me- looks like a blacksmith made gun- am stripping it for parts, hammer, sear, trigger, sear, etc all there- barrel is 26" with the bottom carrier for the ram-rod--small front bead, straight grip stock with inletted fancy long tang and also steel bp with long spur inletted-- barrel is octagonal for first 12" then goes to round- can see the damascus pattern- BUT NO markings anywhere-cap nipple and plug intact, pin hole clean and clear- barrel is a nominal .625 ID, nom .840 OD, somewhat out of round .090" to .110 wall thickness- any ideas as to gauge?, etc-- Gracias!!