Once out, the crown can sometimes be tricky to screw back down, in terms of catching the threads. It's spring-loaded, so it has to be pressed back in towards the case. But once that's done: do you just maintain pressure, and screw it clockwise...or, do you screw it backwards a bit, and then forward? Thanks.

 

Counter clockwise/backwards first while maintaining slight pressure inwards. At some point you can feel the end of the thread on the crown move over the end of the thread on the case. Then screw in clockwise. Never force.

 

Excellent. Many thanks.

 

I’ve never needed to reverse before screwing clockwise. Just press down and hold while s dewing clockwise. Can feel the threads catch. But my oldest is1972, so might depend on age and condition of threading and crown.

 

Yes. I've noticed the more worn they are, the harder they are to engage.

 

That's correct, most likely is condition-dependent but in my own experience and as shown/stated here it is "as simple as that"

 

He uses the back-turn method as well, but I'm curious how many people do that.

 

I guess unlike the women at the bars...

 

Now you are venturing into the theory of probability - what's the probability that the screw is properly aligned when you push down the crown allowing a clockwise turn without a back turn? 0.5? 0.25? We'll let you do the test and report back

 

This.

I use this technique not just for an oyster crown, but just about anything that requires lining up threads. It just works better and minimizes potential wear on the threads.

 

Just clamp the chuck around the crown and pull the trigger.

 

For the benefit of the audience (and watch), I suggest you explain how to adjust the clutch before pulling the trigger.. ...

 

I only use that tool when resetting the date. Switch to low speed when close to required date and use fingers for final adjustment.

 

+1. I use it for any sort of screw-down crowns, from Rolexes to Pams to Seikos.

 

Or...clamp it around Chuck's crown and pull that animal off his head.

 

But who's going to tell him? Or even look directly at it?

 

Push down and screw clockwise.

Quickest way to f#<k any thread is screw the wrong way.

Do the people that turn anticlockwise first, turn clockwise before turning anticlockwise to loosen ??

 

I have found that my technique for screwing has changed as I have got older. It used to be push it in and do it quickly but these days I take more time over it.

 

Any engineers care to be a tie-breaker?

 

Yes.

My technique has changed as well, too.

I especially like when it starts running just from my initial handling; even before I started the screwing in...

I find this seems to happen more often when there’s been a good service and lubrication... others?