hello.. sorry you didn't get a responce earlier ,,it appeares you have a new army model 1892,,made in 1921 from the serial number you provided ,,value i'd estimate would be between 500-800 in the condition you say yours is in ,,maybe a little more to the right collector depending on finish and function,,heres a good site for colt serial numbers,,
http://proofhouse.com/index.htm
bigcurt