An exceptional and highly collectible vintage Swiss chronograph by Difor Suisse, dating back to the golden era of watchmaking (1950s). This premium timepiece perfectly combines the luxury of a substantial solid 18K gold case with a rare, sought-after mechanical complication.Gold Weight and Total Transparency (For Serious Collectors):To guarantee absolute authenticity and value, the 18K solid gold case components have been individually weighed (see pictures):Case Back: 6.53 grams (Solid 18K Gold, hallmarked 0.750 with Swiss Helvetia stamp)Bezel / Crystal Ring: 2.90 grams (Weighed together with the original vintage Plexiglas crystal, which weighs approximately 1 gram)Main Case Body (including lugs): 4.62 grams (Solid 18K Gold)Total Combined Component Weight: 14.05 grams (Net solid 18K gold content is safely estimated at around 13.00 grams).Technical Specifications:Brand: Difor Suisse (The luxury branch of the historic brand)Movement: Manual-winding mechanical chronograph, the legendary Swiss Landeron Caliber 189. Beautifully preserved pink-gilt/copper finish, featuring 17 jewels and Incabloc shock protection.Dial: Stunning original champagne/silver dial with an elegant, authentic vintage patina. Features a multicolor outer tachymeter and telemeter scale, golden applied indexes, and classic dauphine hands.Complications: Bicompax layout with running seconds at 9 o'clock, a 30-minute chronograph counter at 3 o'clock, and a distinctive date window at 6 o'clock featuring red numerals (exclusive characteristic of Cal. 189).Strap: Premium green leather strap with a reptile texture that perfectly complements the warm gold tones and champagne dial.Case Reference / Serial: 712701Condition Report:Aesthetic: Excellent vintage condition. The case retains sharp, clean lines with minor micro-scratches consistent with its age. The dial shows a beautiful, uniform patina that enhances its vintage character.Mechanical: The Landeron 189 movement is exceptionally clean and visually stunning. The watch runs and keeps time, while the chronograph starts, stops, and resets smoothly.No original box or papers included. The watch will be professionally packed and shipped with tracking.