I have a black powder (2 trigger) .45 cal muzzle loader from Tingle Manufacturing out of Indiana. My dad bought it in the early 80's (maybe late 70's). It has 2 triggers (I am a southpaw so it isn't easy for me to use). I haven't been able to find out any information on it online. My dad always said that the guy who made it hand built all the rifles and only made a small number per year. I am not into muzzle loading and am just trying to get information and an approximate value. Any and all help will be appreciated.
Thank you.