Here's some pictures for reference and on the back of the watch it says (50m water resistant, stainless steel, sapphire crystal, swiss made PT6178/88 and a0 59426) if that helps. It looks and feels authentic to me, but after looking online this watch comes as a PT6188/88 can't seem to find PT6178/88. When I google search PT6178/88 it comes up with a bunch of replica sites which is why I am worried.