Watches, machines capable of measuring time. They are usually small to carry on the wrist, they can also be pocket ... but currently in disuse.
They understand or can perform various complications, as well as calculate a specific time and notify us through any alarm.
Currently they are available with several types of operation: through batteries, automatic, (do not need batteries), solar (do not need batteries).
Reinforced polycarbonate case with double gasket crown and screwed safety case back. Black dia/white numbers and black rubber strap. Lighting with night vision tubes (LLT) (25 years of autonomy).