PH. DU BOIS & FILS Chronostop limited chronograph 51/699 chronograph with direct return of second-stop hand, Switzerland around 1991, manual winding, gold plated case with 6-times screwed stainless steel case back, white dial with raised Roman numerals & tachometer graduation, gilded hands, calibre ETA 1168 from the 1950′s, extensive description enclosed, overhaul recommended at buyer's expense otherwise condition 2