The movement is probably over 200 years old and has a verge escapement and fusée and chain power transmission.
Full movement
Balance wheel protector
Balance wheel protector removed
Balance wheel exposed
About half way between the centre of the balance wheel and the centre of the indicator above, the hairsping passes through the pins of the regulator
By turning the wheel, the pins of the regulator move and change the length of the part of the spring that is free to oscillate
The teeth of the wheel under the dial mesh with the half-circle under the balance wheel (pictured below)
The underside of the regulator
The toothed half-circle moves the regulator pins
The half-circle with the regulator pins and its cover
The hairspring stud is attached to the mainplate
The balance wheel staff goes through the full plate and interacts with a pinion attached to the underside of the plate.
This is where the balance staff goes through the top plate
The escape wheel has teeth facing the top plate
Full plate removed
Fusée and chain
Underside of the full plate
Balance wheel staff with impuse paddle (spring distorted to make the picture possible)
Pinion driving the escape wheel
Balance paddle interacting with the wheel’s teeth. Not in the right position, moved for greater visibility.
Escape wheel
Escape wheel
Third and centre wheel
Centre wheel
Fusée and chain
Focus on the fusée and chain
Dial side
Motion works
Hour and minute wheels
Third wheel bridge. I don’t know why a bridge was necessary here.
Ratchet wheel click on the dial side of the movement
