EMC is a mechanical watch whose movement was designed, developed and created by Urwerk. The classic indications of hours, minutes, seconds and power reserve are completed by an original and patented information: the precision indicator δ.

Thanks to this innovative function, at the touch of a button the wearer obtains an ultra-precise electronic measure of the mechanical movement's timing. Which makes EMC – Electro-Mechanical Control – the first mechanism whose performance can be assessed by its wearer. Better still, this information can then be used by that same wearer to fine-tune the watch's timing to achieve the Grail of watchmaking: perfect chronometric performance.