American Western Arms was Dave Anderson's collaboration was ASM (Armi San Marco).
They produced an almost exact replica of the Colt Peacemaker.
Like seen in your photo right down to the grips.
The AWA ran afoul with corporate COLT, over the use of brand Peacemaker, and Colt brought suit.
I had an AWA Peacemaker in 44/40, it was extremely good in fit, finish and function.
I seem to recall the guns were shipped as dissembled parts in the white and then assembled in the USA.
Anderson also made a few Prototypes of C&B and Richards conversion with then USPFA.
The Colt Suit & Andersons' personal issues were the demise of what was American Western Arms.