324 S C FUS AR

A 2017 Advanced Research version of the 324 S C FUS, incorporating a Spiromax balance spring in Silinvar with both inner and outer Patek Philippe bosses. It utilizes a steel compliant mechanism for time zone adjustment, offering a thinner profile, fewer parts, and lubricant-free operation due to the lack of friction or mechanical play. While this design simplifies assembly, it demands high levels of technical expertise and complex manufacturing processes.