Holy Roman Empire, Matthias II (1612-19), oval polychrome enamelled medallion, crowned bust three-quarters left and inscribed Matthias in the field, 38mm x 29.5mm, convex form and inscribed in the enamel on the reverse with the number 57, some edge nicks (when removed from a setting) and enamel repaired at top, otherwise extremely fine

Estimate: GBP £600 - £800