[GreenKeys] White on black lettering?

[Nick England]

> From a discussion Bambi and I have recently had-
>
> Many model 28 machines have white on black writable labels (using white
> carbon paper) on either side of the keyboard for recording circuit or
> service information. e.g.
> https://www.navy-radio.com/tty/ksr/tt307-k6yic-01.jpeg
>
> So why white on black?
> Better visibility in low light conditions or ??
> Is there any official explanation?
>
> Nick England K4NYW
> www.navy-radio.com
>
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