Asandcolored45,
I have been doing a bit more research and now suspect that your "K" serial numbered guns started out as matte blue Rodeo revolvers (refer to the various "serial number" topics here on this forum). Should this be true, someone has taken a pair of consecutively numbered Rodeos and had them gold plated. Also, the grips don't look like anything that I have ever seen coming out of USFA, who pretty much exclusively used walnut, and premium grade walnut, for their wooden grips.
I am fairly confident in stating that the gold plated pair that you have did not leave the factory in that configuration and that the gold plating and grips are "aftermarket" additions done by a previous owner.
So… what are they worth? First off, nowhere near what they would be if USFA had finished them as such. As they are, with a custom fitted presentation case, I would place them somewhere in the +- 2k range, providing, of course, that you can find someone interested in the gold plating which, to many, may seem a bit gaudy. Still, all in all, a beautiful set. Many, many Rodeo SAA's found themselves being refinished by owners who recognized the value of the Rodeo revolvers and wanted to upgrade them with custom refinishing.
CJF
PS: Sorry that others haven't jumped in here but, as I said, things have been a little slow of late here on the forum.