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postage

1974, Mar 11 Mars exploration unwmk p. 12.5 (6 stamps)

X	40f	multi	Spacecraft on way to Mars
X	60f	multi	Mars 2 over Mars
X	80f	multi	Mariner 4
X	1fo	multi	Mars & Hale Telescope
X	1.20fo	multi	Soft landing of Mars
X	5fo	multi	Mariner 9 with Mars satellites

airmail

1974, Mar 11 Mars exploration (no perf info)

-

6Ft

multi

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1974, Mar 11 Mars Exploration issue p. 12.5

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10Ft

multi

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1 to 8 of 8