| 14-19 September 1970: Commencement Overland Telegraph Line 1870 Darwin APM4100
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| 14-19 September 1970: Commencement of Overland Telegraph Line 1870, Darwin NT APM4100 on addressed air mail cover affixed with seashell stamps from Cocos (Keeling) Islands 1c and 4c and cancelled "14 SEP 1970/DARWIN" FDU
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Item #: INV-127217
Condition Co
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