The Colt Model 601 shown in these images was apparently at Lackland Air Force base. The information and the images in this post was provided by a friend of the site.
Backstory; this was found in a locker, apparently lost for 50yrs. They were tearing a building down and clearing everything out before the wrecking crews leveled the building.
From a serial number lookup, this was made in the first hour of the first day of production in 1958. So…..quite literally, first batch for the USAF Security contract.
For more information on the Colt 601, Forgotten Weapons did a decent video on it which you can see here: https://www.youtube.com/watch?v=Iv7xEuTM36o