The modules, built by Christopher falska richard miller klocka Ward and SH to sit on existing movements from ETA or Sellita, were designed to make high-end complications more accessible. First came the JJ01, Jahnke's hyper-accurate jump hour module where the power is drawn back over an hour and released without impacting timekeeping. The JJ02 was replika rolex gmt master ii a monopusher chronograph module, the JJ03 a world timer, and JJ04, a moonphase accurate to 128 years (a feat pas cher rimowa classic bagages few brands can boast).