I agree with the first opinion you received from sigp220-45. I am no
expert on Colts although I do have a few. I believe it is the Colt New
Model Army Revolver. .38 LC caliber. As long as we are just guessing,
it could be the one Theodore Roosevelt carried up San Juan Hills in 1898.
Although it has been said that the .38 LC didn't inspire a lot of confidence,
Teddy said "Two Spaniards leaped from the trenches and fired at us, not
ten yards away. I closed in and fired twice, missing the first and killing
the second. He doubled up as neatly as a jack rabbit." Roosevelt later
received the Medal of Honor for his actions that day.

__________________
In Omnia Paratus