ROCKET MAIL cover

• Rocket-flown on April 23, 1935 by Karl Roberti in rocket P.P.1 - postmarked KATWJIK AAN ZEE
• Perforated rocket stamp tied to cover by red P.P.1 parachute cachet
• Numbered and signed in black ink by Roberti
• Very good condition
• EZ 11C1

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