I like them.............if I had to guess someone modified an aftermarket set. If you get a chance, how about a picture of the other side and the insides of both panels - that may help with ID
They look like the types that are coming from ebay sellers out of Thailand lately. I have purchased a couple of pair, not exactly that style but somewhat similar. They are very well made and closely inletted and I believe are a species of rosewood. The prices are reasonable too.
I think you've hit on it, Walter. The inletting is nice. The finish sanding is kinda wavy, so they may have been modified a little. That's a letter "k" on the sticker for frame size. Sorry for the fuzzy pics. Maybe I need to sell off a couple of guns for a better camera. Nooooooooo!!!!