Just saw this about a new Panerai in-house movement P.4000. Automatic with small seconds and micro rotor, thin so that they can fit auto movement into thinner cases. First piece with this caliper is 45mm Radiomir 1940 PAM572.
http://www.qpmagazine.com/issues/64/first-look-at-the-panerai-automatic-radiomir-1940/
http://www.qpmagazine.com/issues/64/first-look-at-the-panerai-automatic-radiomir-1940/