From a TV repair shop that closed up, I have a pair of RCAs with identical construction- tall bulb variety with gray plates and halo getters, and a single Westinghouse gray plate with shorter bulb (similar to 6CM6). All test well on an emissions type tester- no apparent shorts or leakage. Emission reduces only slightly when filament voltage is dropped to 4.75. These are sold as-is, no returns! I will only ship to a US address. Looking for $149 plus priority mail postage/insurance. Email njradiodoctor at yahoo dot com.