Russian indicator tube 6E5S (6E5C) - magic eye. Tested on BM215A, perfect condition. Equivalent of the american 6E5, but with an octal base! Russian 6E5S tube may be also used as a replacement for the scarce EM4 or EM34, but it needs to be rewired. New old stock tubes - new in box. Made by Svetlana plant in 1957.