English flame mahogany long case clock with high quality rare seven tune function, three train bell strike movement, featuring a High Water at Bristol Key wheel and calendar by Isaac Hewlett of Bristol, circa 1750. A one year warranty is available at additional cost. Dimensions: 87"H x 20.5"W x 10.25"D
Isaac Hewlett apprenticed his father, Andrew from 1741 to 1748. Isaac is credited with many high quality clocks and worked until 1780 as a clockmaker.
This clock has a High Water at Bristol Key wheel, which allows the observer to monitor the tidal influx in a specific location, in this case Bristol Key. Tides are affected by the gravitational pull of the moon and tides do not fall at an exact time on successive days, it can differ between half and one and a half hours. Clockmakers were unable to show that variance, so they averaged, and instead of showing High Tide, they show High Water, which means the tide is near to full and high enough to set sail or enter port. The moon dates are shown in Arabic numerals and the tidal times are in roman numerals, so a single pointer reads both the moon's age and high water for that day.