| USA 1967 (3 Jun) Space Cover NCAR BALLOON BASE Palestine Texas
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| USA 1967 (3 Jun) Space Cover "BALLOON LAUNCHED/FROM/IMAGE BALLOON/NCAR BALLOON BASE/ PALESTINE TEXAS" and typed manu"LARGE AREA X-RAY TELESCOPE/EXPERIMENT FOR DR. WILLIAM/ WEBBER OF UNIV. OF MINN" and affixed with 5c Humane Treatment Of Animals stamp cancelled "PALESTINE, TX/JUN 3/PM/1967/75801"
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Item #: INV-128433
Condition Co
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