| 968 / | HD | HOROLOGY |
| 139 | DD | INDICATING BY VISUAL MEANS (by electric lamps subclass 576; indicating by acoustical means mechanically subclass 217, electrically subclass 580; acoustic signals at preselected times mechanically subclass 229, electrically subclass 580; optical time signals at preselected times mechanically subclass 244, electrically subclass 577; continuous time indication by electric means subclass 564; visible signalling arrangements G08B 5/00) [G04B 19/00] {10} |
| 140 | | .~ Back-gearing arrangements between gear train and hands (transmissions in general subclass 85) [G04B 19/02] {1} |
| 141 | DD | .~.~> For simultaneous indicating on several dials (indicating means allowing simultaneous indication subclass 146; with several separate dials subclass 149; extra hands for indicating different local apparent times subclass 168) [G04B 19/02B] |