The pistol that would soon become the "Colt Caliber .45 Automatic Pistol, Model of 1911" began field trials.
This fine weapon still soldiers on today with many specialized military units and law-enforcement agencies, and in the holsters of countless civilians who are serious about their self-defense or sport-shooting.
Here's my veteran, produced in mid-1918 for "The War to End All Wars" and bearing the "United States Property" stamp.
And here's it's great grandson, which I bought new in 1987 and still carry today:
The components are 100% interchangeable between the two, a testament to the original design.
Hat tip to Bob.