A few years ago the ETF Early Television Museum successfully restored a 1950 Remington Rand Vericolor CBS field sequential colour TV camera to working condition https://www.earlytelevision.org/remington_rand_camera.html . Just recently ETF uploaded a video of that camera in operation to YouTube for all to see https://www.youtube.com/watch?v=fBzfYwamk0M . Also Wayne Bretl old_tv_nut took many portrait photos from the monitor of people standing in front of that camera at the 2016 convention which he has shared on Flickr https://www.flickr.com/photos/old_tv_nut/albums/72157667825789666 . This camera is literally the oldest working colour TV camera in the world predating the RCA TK-40 by 3 years!