A classic and elegant sport watch from 1976, the Seiko 6309-6000 has a 40mm stainless steel "UFO" case with hidden lugs and partially hidden crown and a simple black bezel.  The black dial has applied silver and luminous hands and hour markers and a day/date display at 3:00.  The watch has a 17 jewel automatic movement that is running and keeping time.  The bracelet is a period correct Seiko and appears to be original but we cannot be 100% sure.