TELEFUNKEN EF800 CV5092 pentode
perfectly matched pair NOS, never used tested, selected.
Telefunken Diamond ◇ between pins

both tubes have same serial code: U2105408X
Ulm plant April 12 1970
 tube1: Ia=11,5mA (115%)

  tube2: Ia=11,5mA (115%)
where 10mA is 100% for the new tubes
Perfect tubes for MIKTEK CV4 MK9 MIC ond other professional audio equipment
 no boxes,  tubes come from large military bulk
you will get the tubes from the pictures
I always send tubes by priority registered mail with tracking number within hours after receiving payment