Spring-wound - they are wound with a key, run for 3-5 days.
Quarter beating - 1/4 - beats every 15 minutes.
Alabaster columns.
Chiseled brass ornaments.
Polychrome appliques.
Enamel dial.
Brass frame + pendulum.
The mirror on the background of the columns optically multiplies the space and light reflections, emphasizing the movement of the pendulum.
The antique patterns are typical of the Empire style (Napoleon period).