968 / | HD | HOROLOGY |
503 | DD | ARRANGEMENTS OF ELECTRIC POWER SUPPLIES IN TIMEPIECES (circuits subclass 888; mounting, assembling of components of electromechanical watches subclass 452, of electronic watches subclass 877) [G04C 10/00] {2} |
504 | .~ The power supply being a radioactive or photovoltaic source [G04C 10/02] |