EM84 = 6FG6

em84-2.jpg (11664 bytes)  

Magic eye for side view. It has the fluorescence layer on the inside of the glass bulb. It's a kind of back-projection unit. Used as tuning indicator and level meter. Similar to EM87 and EM840.
Similar type  
With different Vf PM84 = 4FG6
UM84 = 12FG6
CV number CV5434
Swedish Mil.nr.