trying to get a value on my colt 45.pat. dates on side are s...

trying to get a value on my colt 45.pat. dates on side are sept 19 1871 and july 2 1872. serial number is c139351 and match on all three markings. any ideas? new here so i dont know how to put a picture up, but i can provide pics

hello,,heres a great site for dating colt's browning.s ect,, i use it alot http://proofhouse.com/index.htm,,is this a single action or double action ?to post pics ya have to join our site ,,it's free and just need to sign up ,,if ya post a pic it sure is easier to fuigure some of these out..especially older colts,,
thanks
bigcurt