Daytona self regulation Q

[AndTylerToo]

Hello RF friends. Apologies if this has been covered but does anyone have some good advice re: self regulating a Daytona (Ref. 116503). I’d like my watch to gain about 2 seconds. I know conventional advice is to leave it face up. I’ve been doing that but it’s not working. Any ideas? Thanks.

[Jona]

Take it to an AD and have them run timing in 5 positions, a standard test. See if there is a position that will give you the desired result. I have found that Rolexes run very close in all positions, moreso than other brands.

[Tools]

Positional regulation is a function of gravity and friction, and will account for a tiny percentage fraction of "correction".

In bygone days, when beat counts were slow, a small correction may change timing by a second or so.

With fast beat and large mainspring movements of today, the same percentage of correction may not be noticed for several days. It is unlikely that positional correction with a modern movement would ever equal a second per day, let alone 2.

It still works though, it's physics.

[Muxi]

I have not noticed any significant positional regulation in a Daytona. In my Ap it is very easy. Crown down and you lose 2 seconds a day. Crown up and you gain 2-3 seconds a day. Dial up and it is more or less spot on unless you let it sit 48 hours and then it loses 2 seconds a day. Wear it daily and after 3 days it will run fast.

[77T]

Originally Posted by Tools

Positional regulation is a function of gravity and friction, and will account for a tiny percentage fraction of "correction".



In bygone days, when beat counts were slow, a small correction may change timing by a second or so.



With fast beat and large mainspring movements of today, the same percentage of correction may not be noticed for several days. It is unlikely that positional correction with a modern movement would ever equal a second per day, let alone 2.



It still works though, it's physics.

Another factor that has negated the “overnight resting position” is the reduced friction coefficient in the new movements. The gear train runs more accurately and smoothly due to better components, improved lube, finer tolerances, etc.

This has lessened the gravitational impact as well.




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[shawn13ca]

My AK will gain 2 seconds a day. And lose them if it sleeps crown up.