abrod520
·But they do WR testing at the factory with the crown not screwed in so it's not really necessary as I understand my from Archer.
Not really, WR ratings are with the crown screwed in. They're still fairly water-resistant with it unscrewed though - those explanations were for people who washed their hands or went for a light swim with an unscrewed crown, and were panicking about water ingress.
With sealing technology as advanced as it is these days though, screw-down crowns are no longer necessary as they once were. Watch companies just find that many consumers still prefer them as it gives them a sense of security.