This valve was designed for HIFI

ID: 422691
This article refers to the component: To the tube/semiconductor

This valve was designed for HIFI 
24.Aug.17 13:19

Ruben Garcia Bayon (E)
Articles: 53
Count of Thanks: 5

From some information found on internet, this valve was one of the last development in audio + HIFI, may be in 1965 / 1966. So it was not spreadly used.  Was capable of a 10W to 20W audio output in push-pull.

It's similar to the 7868.

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