Prussia: Frederick II 'The Great'

Prussia: Frederick II 'The Great', a scarce silver box medal, 50mm, Victories in Silesia, draped bust left, rev. allegorical figures of Victory and Time, 'VERITATIS PARADOXA'; containing 38 linked paper discs bearing engravings of military victories with explanatory texts verso, in the back a map of Silesia, gap in seam of box lid, otherwise at least very fine.