Stamps of Hong Kong, 23 Nov 1983
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postage
1983, Nov 23 100th Anniversary of Hong Kong Observatory issue wmk. crown & CA spiral p. 14.25
| - | 40c | multi | Old & new observatory buildings | |||
| - | $1 | multi | wind measuring equipment | |||
| - | $1.30 | multi | Thermometer | |||
| - | $5 | multi | ancient & modern seismometers |
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