French, Signed Lepine, 4 column Empire style mantel regulator, ormolu case and with pinwheel, 30 day movement and with a compensating grid pendulum with unique temperature variation scale on the front of the pendulum bob, showing from zero change (at top)

French, Signed Lepine, 4 column Empire style mantel regulator, ormolu case and with pinwheel, 30 day movement and with a compensating grid pendulum with unique temperature variation scale on the front of the pendulum bob, showing from zero change (at top) to a max of plus or minus 40 degrees (at the bottom). Wording is in French (Froid . de Chaud). The pendulum with knife edge suspension, and the dial showing center seconds, the escape wheel having 60 pins and rotating once per minute, c1825 most of the original gilding on the case is intact. Silvered temperature scale on the pendulum is a little oxidized. Porcelain dial is good, signed under glaze, Lepine at 12, and P-duRoy above the 6. Slight scratch between 11 and 12. Hands, pendulum, bell and all case hardware are original. Ht 20"