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 li...
. . . over the phone yesterday! He entrusted servicing of his vintage Turn-o-Graph to my watchmaker, and I was trying to explain the difference in regulating methods between his 1575 and modern Rolex movements. I'm sending him a link now . . .