Frederick Augustus (1807-1812), Medal to commemorate the establishment of the Society of Friends of Science, 1808, designed by Jan Ligber, Warsaw; Av: Bust of the ruler to the left, wearing a wig, below signature LL, FRYDERYK AUGUST I KSIĄŻE WARSZAWSKI; Rw: FREDERICK / AUGUST / KROL SASKI / FIRST PRINCE / OF WARSAW / SOCIETY KROL: / FRIENDS OF SCIENCES / BY HIM / ESTABLISHED. / 1808; H-Cz. 3454 (R3), Szyszko-Czyżak 7 (there in tin); silver, 52.5 mm, 41.01 g; medal slightly rubbed.