[1960electrni]

Hello All,
I recently acquired a Zenith color television set that I would say dates back to 1968, but I am not sure if this is the exact date. It is not solid-state, and I happen to know solid-state sets came out around 1975, so it must be from before then. It is a console TV set, model Y4519-4, and what looks like "Service Saver" chassis type 20Y1C88". Would anybody happen to know a definitive model year for this?

Soon I will acquire another vintage Zenith console TV. It is a Chromacolor II from I'm guessing 1976-77. This one is solid state, as were all CCII sets. It features the "one knob electronic tuner" as well. It may or may not have Zenith's "Color Sentry" feature. It is Model H2526P, chassis 25HC45. Once again, does anyone know the definitive model year? Also, did this TV feature "Color Sentry" or not
Thanks.