Dial case and movement signed. DIM. 39 x 48 mm. THICKNESS 15 mm. The RICHARD MILLE RM004 is considered iconic among RM enthusiasts due to the brands association with motorsports and historic significance of the SPLIT-SECOND CHRONOGRAPH in racing. The model is also regarded as one of the rarest production references from RM as it was rumored regarding its manufacturing difficulty due to the complexity of the movement design. When first released each watch was sold at a financial loss to the company.