Astronomical and Equation of Time Longcase Clock

This is an exceptional astronomical equation of time longcase clock by George Graham with multiple complications. The finely proportioned case reflects the impeccable taste of George Graham. Equation of time clocks were used to reconcile solar time and mean (or clock) time.

Crisply cast and chased gilt Indian head spandrels on the dial were popular in this period. Elegantly shaped gilt brass indicator hand with a finely engraved sun indicates the equation of time. Semi-circular name plaque at the base of the arch is signed, Geo. Graham, London.

A semi-circular aperture fills the arch, containing an engraved astronomical dial which makes one full revolution per year. The dial is read by a pointer at the center of the arch, positioned from top to bottom. The rings are as follows (from the inner to the outer rings):

1. Time of sunset
2. Time of sunrise
3. Position of the sun in the zodiac signs with each sign subdivided into degrees
4. Annual calendar

This fine eight day time and strike seven-pillar latched movement has rack and snail striking, striking the hours on a bell. The unusual deadbeat escapement has an inverted time train (crutch is at the bottom of the movement) - an unusual configuration indicative of Graham's continuing experimentation. The clock employs Harrison's system of maintaining power.

The movement is fitted with a wooden pulley to keep the cable from getting too close to the verge and the escape wheel, thereby avoiding damage - a fine feature indicative of Graham's high standards. The unusually shaped hammer stop is another example of Graham's continued experimentation.

This clock was part of the Iden collection, which was assembled in the 1930's and disbursed after WW II.