9 [ APPARATUS AND SCIENTIFIC INSTRUMENTS FOR TESTING THE RATE AND WATERRESISTANCE OF WATCHES-NAMELY, WATERPROOF CHECKING INSTRUMENTS AND FREQUENCY STANDARDS; AND COMPONENTS FOR USE IN SAID INSTRUMENTS AND WATCHES-NAMELY, LUMINESCENT AND ELECTROLUMINESCENT ELEMENTS FOR THE DISPLAY OF DATA, ELECTRIC AND ELECTRONIC COMPONENTS FOR THE MEASUREMENT OF TIME, LIQUID CRYSTALS, OPTICAL ELEMENTS, INTEGRATED CIRCUITS, TRANSISTORS, RESISTANCES, CONDENSERS AND DIODES ]