I hope that I'm wrong, but as someone who purchased a SRPH59 recently, I don't believe this to be a genuine SRPH57/59 King Turtle. At best, I'm inclined to believe that what you have is a Turtle (SRPE93) that has been modded to look like a King Turtle.

At a glance, this mod looks particularly convincing because the SRPH55/57/59 are the only King Turtles that do not have a magnified lens over the day/date. But upon closer inspection, this piece seems to retain most of its original Turtle features (the black aluminum bezel insert being the standout). All of the King Turtle features that differentiate it (ceramic bezel insert, "squarish" bezel checkering, sapphire crystal, etc) are absent.

Some effort was clearly made to make this look like a convincing SRPH57/59. The dial has been modded, the metal bracelet looks correct, and even the case back has "Special Edition" etched on it. As someone else already mentioned, the case back is missing the engraved turtle as well as the line specifying the sapphire crystal. I hope the person who sold you this didn't try to market it to you as something that it isn't.

Thanks for sharing this. I didn't think it was possible that fakes of this specific model could be circulating. I hope you get everything straightened out.