Whitman Expo
Diagonal diagonal SPECIMEN perf; all-zero s/n 50 francs (withdrawn 11.12.1951) Values
Details
Obverse: French text; astronomer Urbain Le Verrier holding compass; facade of Paris Observatory building
Reverse: French text; allegorical man (Neptune) holding trident, reclining on two stylized dolphins, red curves indicating the planes of ecliptic and celestial equators; penal code; in background, sector of the ecliptic where several signs of the zodiac appear, including Aquarius and Capricorn, where the planet Neptune was located when discovered in 1846
