https://obsoletetellyemuseum.blogspot.com/2012/05/autovox-tvc2278-altair-crt-tube-philips.html
Obsolete Technology Tellye !: AUTOVOX TVC2278 ALTAIR CRT TUBE PHILIPS A56-510X 20AX SYSTEM.
Old CRT Vintage Obsolete Technology Television Web Museum, A place which shows Antique Television technology from 1950 to 2005.