This is a tough one. If its got a red chromatic it
should be a CC2 upright, probably a J or K
If it has a yellow color sentry button with light
sensor a System 3 probably 1st gen with power transformer.
Complicating matters is a few Sys3 sets were sold late
J line & NOT called System 3.
Its a fine looking set & if a first gen S3 its much worth
saving. Probably the most reliable color Zenith built.
73 Zeno
