Historiepenningen - Dr. G.F. Westerman - 1878 - Gold Medal 'Ter Ere van Dr. G.F. Westerman te Amsterdam, direkteur en medeoprichter van Artis Natura Magistra' by J. Elion Zw.442) - Obv: Bust Dr. G. F. Westerman slightly facing right; AAN Dr. GERARDUS FREDERIK WESTERMAN - VEREERDERS EN VRIENDEN 1 MEI 1878 / Rev: EENVOUD VOLHARDING KRACHT within heavy oak wreath - gold 60,36 mm 154 g. - FDC in original case, virtual as struck, extremely rare, possibly unique, this medal was offered to Dr. G.F. Westerman in honor of the 40th anniversary of Artis Natura Magistra