WGBH/WGBX sign-on and sign-off question

[Peter Wiggins]

Questions about the WGBH and WGBX sign-ons and sign-offs

1. When did they introduce the sundown to the sign-on and sign-offs of 
Channel 2 and 44.

2. When did they introduce the zoom-in logo "2" and "44" to the sign-on

Can you give the me the list of sign-ons and sign-offs of Channel 2 and 44 
over the years.

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