Brass Four Glass Mantle Clock With Mercury Pendulum Vintage 20th Century.
A classic brass four glass mantle clock with mercury pendulum.The advantage of a pendulum for timekeeping is that it is a harmonic oscillator: it swings back and forth in a precise time interval dependent on its length, and resists swinging at other rates. Offered in good vintage condition with the odd scratch commensurate with age as found. Has original key. Vintage 20th century.
Size 15.5 x 13.0 x 26.0 cm or 6.1 x 5.1 x 10.2 Inches.
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