EFS-S640D-1AVUEF

The solar panels are designed to capture a lot of light through the small openings in the inner dials, generating enough energy to keep the watch running in normal use for about five months when fully charged.

The carbon fibre-reinforced resin case is light but strong, with a lug design inspired by the double-wishbone, four-arm suspension of racing cars. The small case diameter allows for easy and comfortable adjustment.

1-second stopwatch

Measuring capacity: 29'59

Measuring modes: Elapsed time, fraction of time, first and second place time

Battery display / alert

Battery level indicator

Low battery alert

Run time

Operating time from full charge to stop of hands: Approx. 5 months

Accuracy: ±20 seconds per month

Normal time indication:

Analogue: 3 hands (hour, minute and second hands), 3 dials (24 hours, stopwatch minutes and stopwatch seconds).

Date display

Compatible belt size from 150 to 205 mm