8-day movement, Graham dead beat escapement, trapezium shaped plates;

silvered brass dial plate with exceptional arch and signature, separate chapter rings for hours, minutes and seconds, blued steel hands;

mahogany veneered oak case, wooden vase finials, satin wood rim around the dial; height without finial 193 cm, with finial 209 cm, around 1800.

See : Precision pendulum clocks – Derek Roberts – 1986

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