Historiepenningen - Dr. G.F. Westerman - 1888 - Medal Amsterdam 'Halve Eeuwfeest Natura Artis Magistra' (Zw.782a) without date and years on reverse - Obv: Elephant, tiger and lion around arms of Amsterdam and the Netherlands / Rev: Plain field for insciption above laurel branches; KONINKLIJK ZOOLOGISCH GENOOTSCHAP NATURA ARTIS MAGISTRA - Gold 42,93 mm 38,47 g. - FDC in original case, this medal was given to co-founder Dr. G.F. Westerman, in gold extremely rare