From the ubiquitous 4R36 to the cutting-edge Grad Seiko Spring Drive, Seiko has led the way in affordable reliability and ...

On the technical side, the Seiko 5 Sports watch is as competent as it is good-looking. Inside is a 4R36 automatic movement that can also be hand-wound if the watch sits for too long. Details like ...

but it has made a comeback recently as a more affordable automatic movement. Power Reserve: When a watch spring is fully wound, the power reserve number indicates how long it will tick before ...