In 1964, Seiko served as the official timekeeper of the Tokyo Olympics, marking the first time a Japanese watchmaker had ever held that role and launching the brand's precision chronograph lineage. The Speedtimer SSC961 traces directly back to that heritage, built around a 39mm stainless steel case that stays faithful to the original shape while adding a curved sapphire crystal and a combination of hairline and polished bracelet finishing. The white sandblasted dial carries a black tachymeter bezel, LumiBrite hands and indices for low-light legibility, and a power reserve indicator. The solar Caliber V192 charges from any light source and stores up to six months of reserve, measuring elapsed time in 1/5-second increments up to 60 minutes. Water resistant to 330 feet.