A typical military watch, this Timor, with lots of lume so you can read the time in the dark. The hour hand has lost its luminous compound, though, so that needs to be replaced, and the movement needs a service.
We both first think that the hour hand lume has fallen off and lodged itself at the bottom of the dial, but that is not the case. This slightly unusual luminous compound application marks the bottom of the dial at night.
I carefully hold the balance between my fingers, covered by a sheet of watch paper, and slightly turn the collet. In order to determine how far and in which direction to turn, I have let down the power, and observed the resting position of the balance, and the resting position of the pallet fork. I then turn the balance from its resting position until the pallet fork is completely straight, and that tells me how far and in which direction to turn.
Back in its case, and with a new crystal, looking very nice again!