Ferrari Mailing List: Re: [NFC] Watch regulation

[Martin Stark (MStark]

The tool is graduated with a plumb-bob type pointer in an oil filled 
chamber.  Each graduation is worth 1 sec/day for the smaller pair of 
micro-stellas and 2 sec/day for the larger pair.  The watch was running 
exactly +6 sec/day so I turned each of the smaller pair 5.5 graduations 
towards the balance wheel rim. That is equivalent to about 1/8 of a turn 
of each of the micro-stellas. Kind of like dead reckoning navigation.  
The most difficult part was preventing the unbelieveably tiny star 
shaped wrench opening from slipping off while turning the micro-stellas. 
I confirmed the adjustment by setting the watch exactly to the atom 
clock in DC and observing it over a period of hours/days.  I got lucky 
and hit it just right on the first attempt.  As I'm writing this it is 
reading about +0.5 sec absolute. - good enough to shoot longitude. My 
watch guy said he measured my watch on his machine at +3.8 sec/day and 
that it gained 15 sec over 4 days.  Either his machine is out of 
calibration, or he is bs'ing me.  Btw, the 16528 Daytona uses a modified 
(by Rolex) Zenith El Primero movement.  The 2000 and newer Daytonas use 
a Rolex in-house movement.

Dave Handa wrote:

> Martin,
> How do you confirm your adjust process as you perform it?  I know my watch
> repair guy has a machine he places the watch on to verify his adjustments
> quickly....
>
> Dave
>
>
>
>
> -----Original Message-----
> From: Martin Stark [mailto:MStark [at] Copper.net] 
> Sent: Wednesday, November 22, 2006 9:53 AM
> To: dave [at] davehanda.com
> Cc: The FerrariList
> Subject: [Ferrari] [NFC] Watch regulation
>
> Being the onset of the holiday season, isn't it the time to begin a new 
> watch thread?
>
> Has any other lister ever tried to regulate his watch?
>
> I recently sent my Rolex Daytona (16528) in for service and when it came 
> back it was running +6 sec/day when compared to  The official U.S. time 
> - clock <http://www.time.gov/timezone.cgi?Eastern/d/-5/java> .  Mind 
> you, +6 sec is a lot better than its previous state of being exactly 
> right twice a day, but it still kind of pissed me off that the repair 
> guy didn't bother to regulate it. Not wanting the send it back to the 
> service station, I purchased a micro-stella tool (a very small, very 
> strange wrench) and pair of brass tweezers on eBay and dove right it.  
> DIY watch regulation is not quite as daunting as home dentistry, but 
> certainly not for the faint-of-heart. Somehow I got lucky and managed to 
> not mangle the hairspring or bend the balance wheel pivot shaft whilst 
> wrenching five and a half counter-clockwise graduations on the smaller 
> pair of micro-stellas.  It now appears to be running within a half 
> sec/day of  The official U.S. time - clock 
> <http://www.time.gov/timezone.cgi?Eastern/d/-5/java> Quit while you're 
> ahead now comes into play.
>
>
>
>
> <http://www.time.gov/timezone.cgi?Eastern/d/-5/java>
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