Fifty-year jubilee as calculation master of Jacob Cuyk van Mierop; Silver Medal. Obverse: Winged Time with hourglass on head and scythe in hand; writes with hand why a snake round hangs a number on a memorial; on ground crates; packs of merchandise; filled horn of plenty; in the background plowing farmer inside inscription on ribbon. Reverse: inscription below crossed Mercury staff and wreathed club under Mercury hat and above year and floral garland; Kantschrift.; Amsterdam; Jacob Cuyck van Mierop; Johannes Michiel Lageman; 1813; silver (metal); engraving; d 3.5 cm x w 10.87 gr