Up for sale is a matching pair of two (2) vintage Type 26 triode vacuum tubes by National Electronics. Both units are housed in their original red and white factory boxes. Both tubes have been verified for filament continuity via a digital multimeter, reading consistently between 1-2 Ohms to ensure the internal heaters are completely intact. Untested for specific emissions or transconductance as I do not have a tube tester; sold as-is. Will be packed thoroughly to prevent transit damage.