Approx. Ø80mm, black shell-like protective housing, main case silver, 3-fold, outer case covered with tortoise flap (small defects), both internal cases massive silver with Hallmarks London 1821, spindle work No. 6166, factory signature George Clarke London, enamel dial with the famous salesman signature George Prior(hair cracked), golden hands, walkable, need cleaning. very rare in this size and with all 4 original cases!