/fa/ - Fashion

>>15475102
>>15474979
>>15475067
Many if not most vintage divers do not have screw down crowns. It was a Rolex exclusive patent for a long time. The first divers from Blancpain, JLC, Omega, Longines, Breitling, Seiko all did not have screw down crowns. Nor did the super compressor or skin diver style of watches, it was kind of a professional-only feature for a long time.

Screw down crowns are nice but not necessary if you have a good crown design with a thick gasket that squeezes against the tube. My 60s Gruen diver is like this. When the seal wears out you just replace the crown, whereas when the threads wear out on a screw down crown you have to replace the case tube too which is a much more involved task.

Non screw down crowns are more prone to leaking though and you have to remember not to spin them when you're in water.