It does looks like it's seen some use. The blued sides of the hammer are a give away that the gun has been re-blued. Colt hammers had the sides left in the white on all D/A revolver's until the Mark III series.
I don't know exactly, but that is a late one. I think the last shipment was in Feb, 1919. Yours is probably Jan-Feb 1919. Somebody will come along that knows exactly.I just became a member today. On mine the serial number is. 299 535 The number on the butt is. The butt is
150 798 What can you tell me about the dates?