| 968 / | HD | HOROLOGY |
| 651 | DD | GRIPPING, HOLDING OR SUPPORTING DEVICES (stands in general F16M; for instruments G01D 11/30, B01L) [G04D 1/00] {10} |
| 680 | DD | .~ Supporting devices for clockworks or parts of timepieces (for automatic assembly subclass 654) [G04D 1/06] {2} |
| 681 | | .~.~ Provided with a pickup means, e.g., microphone, etc. (measuring and control means for comparison with a standard frequency subclass 769) [G04D 1/06B] |