I'll bring this story over from the SASS Wire.
I posted a question there a while back on a pair of consecutive "new style" K-Vaquero .45's with CFDA starting out the serial no.
We pondered what it could mean & joked it could be Cowboy Fast Draw (a guess). Hell, it was right.
Fact----Quick Cal worked with Ruger getting a bunch made up for fast draw competition. They were serial numbered with CFDA.
I bought them from a really nice gal who used them for her mounted shooting irons.
These 2 six-shooters are now getting all gussied up to be a retirement gift for a friend who is retiring from the military after 34 years of service and at least 3 deployments (both USMC & US Army).
Still learning about limited edition Ruger firearms,
Mustang