The thermal Reutter Atmos motor. NEVER open the drum if you do not have experience. It can break easily, which is dangerous. (And very expensive to repair.)
Early Cluses movement from a Reutter. (Some parts still missing/broken due to unexperienced "repairer")
Reutter Atmos thermal motor
Reutter Lalique - inside -
Reutter Atmos motor detail. Mercury and liquid ammonia under pressure. At room temperature pressure inside the tube is around 8-12 bar. Can go up to 20 bar if the clock is standing in the sun.
dial blue lalique
Original orange hand
The blue glass cased Reutter