[Hallicrafters] Pyramind

[Joe Connor]

    Can anyone tell me anything about Pyramid brand capacitors? I am working on a receiver that is full of them. They look like Vitamin Q capacitors. Are they reliable or prone to leakage? I'm not sure if I should get rid of them or not. From the age of this receiver, it looks like someone removed the black beauties in the '50s or '60s and replaced them with these Pyramids. 
    
    Thanks.
 
                             Joe Connor