Recently, Jaeger Lecoultre revisited the Master Ultra Thin Moon. They offer it in a new 36 mm case, which is really nice with its opaline dial and its " improved " Cal 925, and in a 39 mm case we know since 2011, but here, slightly slimmer as the first one was 9, 9 mm, which is 9, 3 mm high, now. Even slimmer than the 36 mm case which is 9, 4 mm high! The MUT Moon 36: The water resistance doesn't change. It is 50 meters.