Just bought a Startimer from a forum member and while the watch is in great condition I'm not sure about the screw-in crown. I have a Tudor Gransport that features the Rolex Triplock insulating system which contains a couple of gaskets that you can feel compressing when you screw in the crown. When I screw the Startimer crown in it feels like it just reaches a hard, metal on metal stopping point. Just trying to determine whether this is normal. I'm a little concerned about immersing it in water until I'm sure that it is sealing.