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Jocke - Bad Santa, a revered member of the WatchProSite community, offers an unparalleled look into the intricate world of Rolex's Microstella adjustment system. His detailed photo essay and expert commentary illuminate the specialized tools and precise techniques required to regulate a Rolex movement to COSC standards. This deep dive provides invaluable context for understanding the meticulous craftsmanship behind Rolex's renowned accuracy.
The Rolex Microstella Tool
The Microstella is Rolex system to adjust the balance wheel to make sure the watch
keep the COSC standard. To do that there is a special tool to adjust the screws with.
The old tool looks like this and it's oil filled to be a little more exact and stable.
At the backside there is graduation which means 1 second per day for the low type of head nut and 2 seconds for the high type of head nut for each line.
A closer look to the tool.
Here we have a balance wheel with the Microstella screws.
Here is how it works.
A few pics of the tool in action.
The instuctions from Rolex.
And some pics of the new/current Microstella tool.
Photo credit for the new Microstella tool: Tony Axelzon
So lets put up a watch at the timing machine. Not good -17 seconds a day.
So I pull off the bracelet.
With the Ref 2100 tool.
Take place in the case opener.
Off we go.
Let the fun begin
This is a little tricky.
22 minutes later we are close. A little low amplitude so maybe a service will made it perfect in the future.
You are one crazy Watch Santa! Congrats on achieving theoretical 0 seconds a day! And... When can I borrow your Lange?
I gather when you make an adjustment you do it to the screw and the opposite screw? How do you decide which pair of screws?
I would love to buy a microstella tool, such a lovely ornamemt! 🙏🏻
Then I try to get all four screws at the same height to avoid imbalance. There is some adjusting before you reach a good result.
Not many dare to get into a Rolex, but that's what you have to do as they are easy to work with and difficult to break. Logical solutions that can be understood. I probably wouldn't have get into a Patek, I also have limits, even if it doesn't seem like it sometimes. 😂😂
As I usually say to the Danes, the only thing that is better in Denmark than in Sweden is the view over the strait. 😂
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