Ball watch company engineer ii powerlight 72 nm2126c scj bk ball watches continue to assert their role as a key protagonist in the exploration of modern watchmaking and this ball engineer ii powerlight 72 has impressed the watch world with its 72 hour power reserve unlike most watch brands who increase the number of barrels in a watch to expand the power reserve and thus increasing the weight ball watches have instead decreased the frequency allowing the movement to keep going for longer whi