| Australia 1969 (23 Oct) Space Cover Balloon Experiment Australia-USA Mildura
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| Australia 1969 (23 Oct) Space Cover with image of Balloon and Payload "EXPERIMENT LAUNCHED/ FROM/ AUSTRALIAN-USA SPACE/ RESEARCH AND BALLOON/ LAUNCH BASE MILDURA" with pencil addressed and 5c black and blue QEII coil stamp cancelled "MILDURA/23OC69/VIC-AUST"
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Item #: INV-127962
Condition Co
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