Seiko Automatic Diver SKX419K Stainless Steel, Cal. 7S26

View from Top
we are looking directly into a nudge of the screwed case back.  If I would dare, I could mount the display back of my Seiko 5 "See Through" on this watch. But I am afraid, I am not as courageous as Tommy T.S. from Phuket, Thailand, that tried that already successfully on a vintage Seiko.