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Mechanical Television Daven Disks
This is a T-468 "Tri Standard" disk. It has three sets of holes: 24, 36 and 48 lines.
T-24. 24 line disk. Abouty 14 inches in diameter Donated by Mark Fliegel
From Walter Rowan 1929 catalog Invisible text to format smartphones. xxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxx xxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx |
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