Monochrome glass envelopes, the foregoing certified by the importer as being for actual use in automatic data processing machine data or graphic display cathode ray tubes
Glass envelopes (including bulbs and tubes), open, and glass parts thereof, without fittings, for electric lamps and light sources, cathode-ray tubes or the like:
Monochrome glass envelopes, the foregoing certified by the importer as being for actual use in automatic data processing machine data or graphic display cathode ray tubes