Hello! The chassis is identical to the one which equipped an old Braun FS 1000 color tv I had when I was a boy. It produced a very good picture for many years and then the HV transformer went bad. The replacement was already no longer available in the eighties. It had a bonded picture tube made in USA I think from Westinghouse and a completely white, huge cabinet . Too bad I completely destroyed it...
It had controls exactly placed as the Kuba and a plastic black trim around the screen.