MIKE ROSS wrote in a message to Matt Mc_Carthy:

 MR> But the cheesiest had to be in the late 50's or early 60's where
 MR> one could buy a transparent plastic overlay to place over the crt.
 MR> The top was tinted blue and the bottom green. It worked great with
 MR> outdoor scenes such as in "Daniel Boone" with Fess Parker but it
 MR> made Ed Sullivan look bizarre. Thank God for pot or we would never
 MR> had gotten over the horror.

Yeesh,  I'd forgotten about those until you mentioned them...

Saw them for sale in NYC as late as the mid-60s.

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