Rococo - Ball-footed goblet

Silver, partially gilded. Resting on three screwable ball feet, the rounded, cylindrical body is adorned with a slightly protruding lip. The surface is adorned with relief sculpted rocailles and acanthus leaves, transitioning into three medallions framed by C-shaped curves, each containing a portrait bust. The interior is gilded. Marked twice with the unknown initials "M P B". Height: 10 cm. Weight: 145 g. Compare with Rosenberg, Volume I, Number 1437 (?). A probably Wroclaw Rococo parcel-gilt silver beaker. Gilt inside. Marked twice with the unknown initials "M P B". Likely from Breslau. 2nd half of the 18th century.