| 968 / | HD | HOROLOGY |
| 368 | | WATCH CRYSTALS; FASTENING OR SEALING OF CRYSTALS; CLOCK GLASSES [G04B 39/00] {4} |
| 369 | DD | .~> Made of glass [G04B 39/00B] |
| 370 | DD | .~> From a material other than glass [G04B 39/00C] {1} |
| 372 | DD | .~> With means for magnified reading (combinations with a magnifying glass in general subclass 398) [G04B 39/00G] |
| 373 | DD | .~> Arrangements for sealing (sealing the case and winding stem subclass 327) [G04B 39/00K] {1} |