Lot 493

Henry Moser & Co., Case No. 814, 53 mm, 138 g, circa 1890
A very fine, astronomical hunting case pocket watch with full calendar, moon phase and equation of time
Case: 18k gold. Dial: enamel, window for day and moon. Movm.: bridge movement, keywind, gold screw compensation balance.
Movement, dial and the case of this pocket watch with its finely engine-turned pattern are in excellent condition; quite unusually the watch also boasts a rare equation of time indication. Equally remarkable is the pusher for moon phase and day of the week, which can be moved back and forth with a slider.
Equation of time: This complication turns the "Raederuhr" into a sun dial. The "Raederuhr" shows midday every 24 hours. The sun dial on the other hand shows midday when the sun is at its highest point. Due to the inclination of the Earth's axis and the ellipticity of its orbit the sun is not always at its highest point at the same time. A clock with equation shows the extend of this deviation.