FRANCE (1970) De Broglie*. Ray-producing apparatus*. Deluxe sheet. Scott No B439, Yvert No 1627.
AVAILABLE AT $20
COMORO ISLANDS (1963) Carved lamp*. Deluxe sheet. Scott No 59, Yvert No 31. Attractive!
AVAILABLE AT $25
FRANCE (1986) François ARAGO*. Graph*. Stars*. Deluxe sheet. Arago proposed that light traveled slower through water. He also explained why stars twinkle, and developed the first electromagnet. As a politician, he issued decrees abolishing slavery in the French colonies. Scott No B575, Yvert No 2396. Interesting guy!
AVAILABLE AT $15
FRANCE (1997) Beams of light*. Bloc gommé. Yvert No 3113, Scott No 2615. Quality.
AVAILABLE AT $40