Royal Observatory Greenwich – postcard collection
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Estimated date
194751
Publisher
J. Salmon Ltd., Sevenoaks
Publisher's title
24 Hour Magnetic Clock, Greenwich
Nominal size
5.5 x 3.5 inches (real photograph)
Publisher/printer ref.
18712
Website ref.
PC0288
Links
Other versions of the same image

© J. Salmon Ltd.
 

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