Reference: 3931Movement No: 1'583'057Case No: 2'834'620Year: 1987Calibre: E23 C, QuartzDial: White, Roman numerals, signedCase: Length 34mm, Stainless steel, hobnail decorative bezel, solid case back, signedStrap: Endangered species, stainless steel Patek Philippe buckleAccompaniments: Extract from the Archives confirming production in 1987 and original date of sale on 30th September 1988, service paper