Omega says that this allows the LdP to take more accurate measurements
link during the 15 days of chronometer testing according to the ISO 3159 standard. This standard outlines the positions, temperatures, and conditions a
link watch must undergo to meet chronometer standards according to ISO. The 15-day testing period is specifically for wristwatches (if you care, carriage clocks get measured
link over 19 days and quartz watches over 13 days).