Historically Patek Philippe has never made many steel watches. Steel was never in the company's DNA Patek executives say. True some steel pieces rank among the firm's most famous watches. But that's because they are so rare. A perfect example is Ref. 1518 the world's fausses Richard Mille rm 016 first perpetual calendar replica Richard Mille rm 61 chronograph produced in series. replica Richard Mille rm 005 The firm produced a total of 281 four of them were in steel.