EI YUGOSLAVIA \ TUNGSRAM 6AQ8 \ ECC85 Double Triode B9A NEW NOS Selected tubes.
EI produces tubes for many other marks like Tungsram, Philips, Fivre, Siemens and others, so these tubes are the same but only with different labeling. Very high quality standard tubes, EI is known for his knowledge and quality without be expansive. Printing on the glass may be different depending on availability of stock.