The type of escapement remontoire used is that by William
It's action is explained as follows and is depicted in the drawing
The relatively enormous size
of the escapement wheel will be noticed. The piece P which
is pivoted, serves to communicate the impulse of the remontoire spring by
means of the arm I, and a second arm J
unlocks the detent e after I has
disengaged from the impulse pallet, thus causing the piece P
to be returned to its initial position (locked by the detent d
with spring S wound).
Chronometer, Rupert T. Gould, pp. 142-143 and p. 181.