Y Gravity Concept
Double pendulum clocks are uncommon due to their complexity.
However, when arranged in anti-phase they can be made more stable by transmitting energy back and forth between the duo. Essentially the pendulums are communicating with one another to cancel errors.
About a dozen double pendulum clocks have been made over the history of Horology. My interpretation would be driven by a modified gravity escapement acting on both pendulums with the conversation taking place
via a flexible coupling.
Interior lighting above the movement. Black piano case.