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A Wireless Auto-Alarm Device, Siemens Bros (b/w photo)

IMAGE number
LLM7158856
Image title
A Wireless Auto-Alarm Device, Siemens Bros (b/w photo)
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Artist
English Photographer, (20th century) / English
Location
Private Collection
Medium
black and white photograph
Date
C20th AD
Image description

A Wireless Auto-Alarm Device, Siemens Bros. Illustration for From Telegraphy to Television, The Story of Electrical Communications, by Chetwode Crawley (Frederick Warne, 1931).

Photo credit
© Look and Learn / Bridgeman Images
Image keywords
20th century / 1930s / communication / history / progress / science / technology / black and white / photo
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Asset - General information
Largest available format 2197 × 3313 px 1 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB]
Large 2197 × 3313 px 186 × 281 mm 1.2 MB
Medium 679 × 1024 px 57 × 87 mm 760 KB

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