Signed pewter quaich

Signed pewter quaich, 18th century. Cast marker’s mark under both handles “A. Bort” with “M M” engraved underneath. Extremely rare form with a fruit finial on as lid with beaded rims. The bowl handles are formed as rococo cartouches. This is a special piece that would be a beautiful gift.
H. 5.5″, w. 12″, d. 6.5″.