Royal Observatory Greenwich – postcard collection
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Estimated date
1908
Publisher
G.P. & O.S.
Publisher's title
Watching the Ball, It drops at One P.M. / Royal Observatory.
Nominal size
5.5 x 3.5 inches (real photograph)
Publisher/printer ref.
112
Website ref.
PC0152
Links
Other versions of the same image
Cards based on photographs taken on the same day

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