6 ms·When my F-91W breaks I will upgrade to a F-105W.by rejschaap 6y agoWhen my F-91W breaks I will upgrade to a F-105W.rmorey 6y agodon't hold your breathe2021 6y agoThe watch never breaks, but the strap will break after 1-2 years of continuous wear, and its cheaper to get a whole new watch than a new strap.