I am unable to find a match for this item. I will opt-out and allow another expert to answer.They will see our conversation and your photos. I am not able to respond once I opt-out. Good luck!
Hi, my name is*****'m a certified appraiser, and I'd be happy to help.
Where and when did you purchase it? That will help me narrow down a locality, possibly.
This was clearly a local custom furniture designer at the time, but alas, over the past 25 years this maker has been lost to history. I've checked every source I can with no results.
I can certainly appraise the set, at retail or resale, based on like kind and quality, if you wish, but information on "K. Koch" or any southwestern Koch in furniture design, doesn't seem to be out there.