Estimated date |
1967–71 |
Publisher |
H.M.S.O. / National Maritime Museum |
Publisher's title |
The Time Ball Signal, Old Royal Observatory, National Maritime Museum. ... |
Nominal size |
6.0 x 4.0 inches |
Publisher/printer ref. |
Card No. 238 |
Website ref. |
PC0614 |
Links |
Other versions of the same image Cards based on photographs taken on the same day |
© Crown Copyright. Printed by Larkfield Printing Co. Ltd. Note the commemorative postmark. |
© 2014 – 2024 Graham Dolan
Except where indicated, all text and images are the copyright of Graham Dolan