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MARTIN L. PERL - FIRST DAY COVER SIGNED - HFSID 267726

The Nobel Prize winning physicist signs his name on this First Day Cover honoring the Soil Conservation Movement in America from 1959 First Day Cover signed: "Martin L. Perl", 6½x3½.

Price: $70.00

Condition: Fine condition
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MARTIN PERL
The Nobel Prize winning physicist signs his name on this First Day Cover honoring the Soil Conservation Movement in America from 1959
First Day Cover signed: "Martin L. Perl", 6½x3½. First Day Cover honoring the Soil Conservation Movement in America, 1959 4-cent stamp affixed, postmarked Rapid City, South Dakota, August 26, 1959, FIRST DAY OF ISSUE. Martin Perl (1927-2014), a researcher at the Stanford Linear Accelerator, earned the 1995 Nobel Prize in Physics for discovering a new elementary particle, the tau lepton. A superheavy cousin of the familiar electron, the tau lepton is 3,500 heavier and survives for only a trillionth of a second. Fine condition.

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