1960 U.S. ROCKET MAIL covers- Rocket-flown by SOAR on September 24, 1960 - postmarked LINCOLNVILLE, MAINE
- Two SOAR covers with rocket mail stamp blocks of 4 - one perforated, one imperf
- Both are signed by Perry F Zwisler - Secretary of SOAR and E-Z catalog co-editor
- Numbered 14 of only 25 such sets
- Very good condition
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