| 968 / | HD | HOROLOGY |
| 69 | | SUPERVISION OF THE STATE OF WINDING, E.G., INDICATING THE AMOUNT OF WINDING, ETC, [G04B 9/00] {2} |
| 70 | DD | .~> By optical indication of the amount of winding [G04B 9/00B] |
| 71 | DD | .~> Devices controlled by such state, e.g., device affording protection means against overwinding, etc. (protecting means preventing overwinding arranged in or on the barrel subclass 16; protecting means in connection with keys or the like subclass 36; in connection with parts of the cases subclass 38; in connection with automatic winding devices subclass 66; electric winding up of mechanical clockworks subclass 443) [G04B 9/02] {1} |