Colt has used the name Commando for a variation of the M4 carbine, and also for a variation of the Detective Special (around 1980). I assume the one meant is the WWII revolver supplied to the U.S. government.
The WWII Commando was the Official Police with a Parco-Lubrite finish (a variation of Parkerzing) and plastic grips. While Colt was involved in making the M1911A1 service pistol, as well as machineguns, it still had revolver production capacity that could be used to support the war effort. About 50,000 were made, with some being used by the military, though most seem to have gone to the Defense Supplies Corporation for use by police, plant guards, etc. One source says that the trigger, cylinder latch and hammer were plain and uncheckered. That is true for the trigger and cylinder latch, but the hammer has the normal OP checkering. There were 2 and 4 inch barrel versions.
Prices can be fairly high for ones in good condition, around $1000 for a like new example. Ones in very good condition are reasonably common as, unlike the S&W M&P's, most Commandos stayed in the U.S.
Jim