Feature:

This tool is for regulating/timing for AP3120/312 PP-324-S watches. Many for  AP3120/312 PP-324-S watch movements have tiny screws on the balance wheel which turn to apply tension to the hairspring.

This tool allows the precise rotation of those screws with its specially designed end which grips and rotates the screws. Lines inside the plastic housing indicate and measure the amount of rotation.

This is a professional tool for the watchmaker who services for AP3120/312 PP-324-S watches.

Fit for AP3120/312  PP-324-S

Package included(Optional):

1*Watch Balance Regulating Key Wrench Tool