Rolex Crown Single/Multi-start Thread?

[MoQa BianQa]

Hello,

Been recently reading into fastener threads and learned that single start-threads and multi-start threads each have their own pros/cons. Often times screw-down mechanisms such as a water bottle cap utilizes multi-start threads to reduce the number of turns and increase water-resistance.

This got me curious, does anyone know if Rolex double-lock/trip-lock crowns use multi-start threads? If so that might be noticed when the crown is fully screwed down - can land on different positions. I've noticed my old Date-just crown landing on two different positions when fully screwed, however this also may be possible because the crown threads have been stripped (it's a very old watch that has yet to be serviced).

*can't post photo explanation yet cause my post count is still below 10. So please Google.