Patek Philippe stainless steel Reference 1518: Steel Rare
Launched in 1941, Patek Philippe’s Reference 1518 became the world’s first perpetual calendar chronograph wristwatch produced in series. Between 1941 and 1954, only 281 pieces of this Reference 1518 were made, the majority of which were in yellow gold. What came after the Reference 1518 is the Reference 2499 and it is housed in a wider case with fluted lugs. … More