This 400 day clock was made by the Philippe Haas factory circa 1910 and was sold with the Hauck temperature compensating pendulum which used bimetallic arms on the outside of the pendulum. This pendulum attempted to maintain timekeeping as the temperature changed between seasons. This is not to be confused with the common disc pendulum although it has a somewhat similar appearance. Although not a successful invention, clocks with these pendulums are quite rare now and are attractive clocks in their own right. With modern suspension springs the timekeeping of these clocks is good. This clock has been overhauled, lacquered and polished and runs well, keeping good time. Note the gimballed suspension block at the top, a feature not seen in later clocks.