I managed to snag this one a while back. Remington used to only make a few small production runs of this gun every year. I say "used to" because with the current state of Remington from a business and financial state, I'm not sure what they are, and are not producing any longer. The only positive identification that the gun is an actual Police Model of the Marine Magnum, is the 25047 Order Number on the box.
There is no other identification on the gun to determine it's a Police Model..... Except for the rifle sights, and the all metal trigger group. ("Special Purpose Marine Magnums" have the front bead only sight, and the Polymer trigger group, and the 25012 Order Number.) The Police Marine Magnum also comes with a milled extractor, (not MIM), and is put together on the Police and Wingmaster assembly lines, to a higher degree of fit and finish. Not the Express line.
I was able to purchase this through Davidson's, who, at the time, received a small number of them. (They were sold out within a couple of hours). Be advised there are A LOT of these guns being misrepresented as Police Models of the Marine Magnum, that are NOT. Again, the order Number MUST be 25047 for it to be an actual Police Marine Magnum.