Now to my
old-eyes: That Magic Screen mechanism looks to contain a
“ribbon” running on rollers.
A single panel
that is simply (and elegantly) cycled across the front bingo card to change
it’s appearance.
Can anyone say
“sensor” _Obviously mechanical way back when, photo-diode/LEDs
would definitely
be used today,
but this shows just how “savvy” the Belgium designers where
from the very start.
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