I've discovered a passion for "clockwork" wind up clocks - I currently have a Minuette branded float balance type that is loosing time.
My other clocks I can adjust using a small screw or adjusting the pendulum.
On the body internally is marked "+" and "-", close to two screws (however these screws just loosen the balance wheel mechanism)
There are also two "butterfly" type things above the markings.
If anyone out there has any clues to how to do this, I can post some pics later tonight.
Help please :-)