A very nice award medal from the Poniatowski era.
"For diligence," as its reverse tells us, is a medal founded by the king in 1767 for alumni of the Cadet Corps in Warsaw. Since 1786 it has been given to outstanding students throughout the country.
By Holzhaeusser (unsigned).
Obverse: crowned SAP monogram in a laurel wreath.
Reverse: inscription DILI-GEN-TIAE in an oak wreath.
Silver, diameter 27 mm, weight 7.19 g.