Input (grade 10): His small, drum-shaped Taschenuhr, a portable watch which he built during his asylum from 1504 to 1508, could run for forty hours before it needed rewinding.
Output (grade 3): Around 1504 to 1508 Henlein did make a a watch; a small, drum-shaped Taschenuhr. It could run for forty hours before it needed rewinding.