According to....
By: jimly : January 19th, 2012-09:08
the OP website, the thickness of the 392 is the same as the 312. In fact, everything is the same except: The crystal on the 392 is a bit thinner (approx. a millimeter) The 392 is water resistant up to 100m versus 300m on the 312 Of course, the 392's case ...