France, Louis XV (1715 - 1774). Silver Jeton (Token) of the Royal Academy of Sciences (L'Académie des sciences), no date, issue of 1747, signed FM (François Marteau), Feuardent 4407, Guéant - Prieur 582 M, Silver 30 mm, weight 7,90 g., Condition XF, Beautiful patina and mint shine
