| 968 / | HD | HOROLOGY |
| 426 | DD | WINDING MECHANICAL CLOCKS ELECTRICALLY (winding mechanically subclass 23; electrical winding of spring-driven arrangements for gramophones G11B 19/20) [G04C 1/00] {5} |
| 429 | DD | .~ By electromagnets [G04C 1/02] {3} |
| 430 | | .~.~ With snap-acting armature [G04C 1/02B] {1} |
| 431 | DD | .~.~.~> Winding up springs [G04C 1/02B2] |