Silver onion calendar watch with key, the dial... Lot 23

Silver onion calendar watch with key, the dial with Roman and Arabic numerals signed "Wilter London", date window at 6 o'clock, the plain silver case inside numbered 5249, the bezel of the double case with mythological decoration of Diana and Actaeon, rooster movement signed "John Wilter London" and numbered 5249, old label inside the case "Caille Md watchmaker". England, circa 1770 (Gross weight: 112.5 g) (Diam. 40 mm) (function not guaranteed).