Watch List notes:

(x) Sir Isaac Newton (1647-1727), Memorial Medal, in silver, by J Croker, bust left, rev. FELIX COGNOSCERE CAVSAS, Science seated left (head backturned), holding plan of Solar System, 51.5mm (MI 469/83; Eimer 504), a handsome medal, light attractive tone, a pleasing extremely fine, scarce.

Estimate: £400 - £500