I know nothing about Columbus watches and haven't had any in my collection.
But... I was struck by this one... which has a solid gold case and a flawless, multi-color dial. The movement is in good shape and looks high-grade as well. It was recently serviced and runs well.
I saw it at the National but I was too disracted to give it much thought. It sold but I got a 2nd chance to buy it. I figured that there can't be that many fancy Columbus dials around. My failure to recognize it, at the National, cost me but it all ended well!