Yes, such sets would have been made circa 1951 and the proposed adapters (in practical terms they were nonexistent) intended for plugging into those sockets used a rotating wheel with segments of red green and blue translucent filters. Per the CBS system each segment would pass in front of the screen as its corresponding color field was being traced.
More here:
http://www.earlytelevision.org/cbs_color_system.html