Watch List notes:

COMMEMORATIVE MEDALS, World Medals, Germany, Madonna della Sedia (Madonna of the Chair), Uniface Circular Plaquette in Berlin Iron, c.1820, by Leonhard Posch (unsigned) after Raphael, the seated Madonna holds the infant Christ, St John stands to the right, 112.5mm (Forschler-Tarrasch 847). Very fine, scarce.
From the painting in the Palazzo Pitti, Florence. Made at the Royal Prussian Iron Foundries.

Estimate: £100-150