![](http://www.alamy.com/thumbs/6/A581B73E-270B-4CB4-A24C-87EACCB70F3D/2ABGPFJ.jpg)
Early television (1920's-30s) - An unusual photograph of a family group watching an early Baird Televiser. The home constructed mechanical-scan television receiver produced a picture using a spinning metal ' Nipcow' disk with holes in it, whilst a lamp produced a 48 line scan to initially produce a poor dim orange image inches square, at frames per second.
Size: 7682px × 4519px
Photo credit: © Colin Waters / Alamy / Afripics
License: Licensed
Model Released: No
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