Impossible to answer without a detailed description of all markings, features, barrel length, sights, grips, box, papers, accessories, condition, type of action, and most importantly, the serial number.
about 1920
Proofhouse.com has Colt sn data, 100-400 USD
50-350 usd
100-10000 USD
1924
about 1920 the value would depend of overall condition of pistol.
10-1000 usd
No way to answer without the serial number.
Proofhouse.com has Colt sn data.
it was made about 1907........................
1899
manufacured about 1915.....................