The 1974 Seiko 6106-8660 "Actus / SS" is a 37mm men's automatic watch with a stainless steel case and an analog dial protected by hardlex crystal. It uses a 6106 caliber self-winding mechanical movement that cannot be manually wound but can be hacked (the second hand stops when the crown is pulled out). It ticks 6 times per second which gives the second hand a smoother movement than quartz watches which tick once per second. This type of movement is wound by shaking
The case of the 6106-8660 measures approximately 37mm wide (not including the crown) and is water resistant to 30 meters. This should be sufficient for splashes & rain but is not recommended for baths, showers, swimming or diving
It features a beautiful restored red dial and Day function in English and Japanese
Automatic 25 Jewels Movement has been cleaned oiled and serviced and functions precisely 
it comes on a new generic brand genuine leather band with stainless steel buckle