This is a custom tool to adjust the hand of the chronograph on one particular movement only. It sets where the hand resets to when you push the reset button. Obviously you want it to reset to zero. Took a while to make but I will need it for the final exam next year
The little pin holds the arm of the wheel. When you put the top on and twist it, it turns the friction fitted part that determines the position.
This is a barrel closer. The barrel is shown here too. If you have no clue what a barrel is, it holds the mainspring which is the power that drives the escapement and on to the rest of the watch. This is what you are winding when you wind a mechanical watch.
These are just a couple special screwdrivers for a certain eccentric screw. Can't remember what movement it's for but no one cares anyway...
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