Trying to authenticate two Seamaster Planet Ocean’s

I have two 45mm Planet Ocean's that I'm trying to authenticate. One is a 2008 with an ETA 2824-2 movement, and the second is a 2012 sapphire viewback, with an ETA 2836-2 movement. This one says Omega CO-AXIAL 8500 on the rotor? Please see the attached photos. Neither has boxes or papers.