Absolutely beautiful Colt. It makes me cry! Part of where the last line in my sig came from was one very much like yours. Original diamond grips, lanyard ring magazine, U.S Government, Colt horse made in 1918. Through a couple deals I got it in the late 60's for about $45. Traded it for a S&W 645 around 1985. Decent trade at the time. I knew the Colt belonged in a display case, and I wanted something to shoot. At today's prices, I could have several things to shoot for what that Colt would be worth.
Congratulations on owning a very fine piece.
BTW, I also kind of got rid of the Garand I had to, but it is still in the family. I gave it to my Son after he killed his first deer with it as I did mine after my father had given it to me. Told him that his grandpa would want it to go nowhere else!