Hope someone will be able to assist in determining the value of this watch. Watch runs. needs crystal, bow and a key. Outer opening shows names Gerard, Jacot 18K hallmark. Inscribed on back Chas. E Jacot, Chaux de Fonds. Serial number 24400. movement signed Chas E. Jacot. Patented Oct 1867. With serial number 24400. Gold value about $550.