GP TOTW 32

The mechanical movement undergoes countless changes in environmental conditions and temperature in the course of a day. Its rate is adversely affected by magnetic fields, dust, condensation water, irregular winding and the oils drying out. However, every day it counts 86,400 seconds. And even though its running is influenced, its accuracy is nearly 100%. In fact if the movement runs ahead by just one seconds a day, it is off its normal running by just 0.0011%