Due to the ever changing orientation of the Earth, tilting on its axis as it travels along an elliptical path around the sun, a day is rarely exactly 24 hours long. This deviation is almost never taken into account in regular civilian life, despite the fact that a day can be up to 15 minutes longer or shorter depending on the time of year. An Equation of Time indicator solves this issue, being able to display the real time difference between civilian and true solar time, and in the case of the present watch is indicated on an outer ring graduated to +/- 15 minutes. As a further step taken to ensure🔴 perfect precision, each watch is calibrated to a specific city with this limited edition of 20 units set for Hong Kong.