Black ceramic gives the tonneau case a firm outline
The Spirit of Big Bang 642.NM.0170.RX uses a black ceramic bezel to define the 42mm titanium case. That contrast helps the tonneau profile read cleanly from the front, especially around the open dial and pusher side. It is a darker configuration, but not a flat one; the bezel, case facets and dial layers keep the watch active as the angle changes.
















