How long does a self-winding watch stay wound?
multipleQAs
How long does a Rolex Oyster Perpetual from 1930 self-winding watch stay wound? How long does a Harwood "bumper" self-winding watch from 1923 stay wound? How long does a Miyota 8215 self-winding watch stay wound? How long does a Chinese standard movement self-winding watch stay wound?
35 hours
12 hours
over 40 hours
minimum 40-hour