Colt Service Model Ace Serial Number SM2966 - WWII issue, W.B. inspector's mark for Col. Waldemar S. Broberg, Army Inspector of Ordnance from July 1, 1941 to June 16, 1942 at the Hartford/Springfield Ordnance District.  The slide of this gun is numbered 2906.  Both Service Model Ace pistols SM 2966 and SM 2906 were shipped to Springfield Armory 2-16-42 in a shipment of 53 guns.

Close-up of the W.B. ordnance mark.  Pistol is fitted with a M1911 trigger.

Right side.

Right side close-up of serial number.

Right side close-up of Service Model Ace slide markings.

Major component parts of the Service Model Ace.  Left side pictured with two-tone magazine.

Barrel, floating chamber and milled ejector.  On the early barrels they peened a short piece of piano wire to the barrel and cut a groove into the ejector to retain the ejector in place.

Close-up of barrel, floating chamber and ejector disassembled.

Close-up of barrel, floating chamber and ejector assembled.

Checkered mainspring housing and grip safety.

Front grip and underside of frame.