| 968 / | HD | HOROLOGY |
| 426 | | WINDING MECHANICAL CLOCKS ELECTRICALLY (winding mechanically subclass 23; electrical winding of spring-driven arrangements for gramophones G11B 19/20) [G04C 1/00] {5} |
| 427 | DD | .~> By electrothermal or electro-pneumatic arrangements [G04C 1/00B] |
| 428 | DD | .~> For clock systems (subclasses 429-434 take precedence) [G04C 1/00F] |
| 429 | DD | .~> By electromagnets [G04C 1/02] {3} |
| 434 | DD | .~> By electric motors with rotating or with reciprocating movement [G04C 1/04] {2} |
| 443 | DD | .~> Protection against overwinding (in mechanical clocks or watches subclasses 16, 36, 38, 66, and 71) [G04C 1/10] {2} |