saberj2002

The original Seamaster 600 Ploprof was designed to be completely hermetically sealed so an replica Richard Mille rm 22 HEV would not be necessary. The idea being that if helium never made its way in, it would never need a way out through a helium replica Richard Mille rm 11 escape valve. When the 2009 Ploprof was released with a helium escape valve, it was a major point of contention, along with the watch growing a few millimeters.