Valves. Brimar Mazda ECC83 grey ladders plates NOS 1962-1972

Hello!


I want to upgrade my cdplayer with new old valves ,NOS.

Does anybody know something about this valves:

Brimar - Mazda ecc83 grey ladder plates, NOS, 1962-1972.


I think, that are valves, which produced Birmar for Mazda.

Are they similar to the Mullard ecc83, NOS?

Are they playing in the same class?

What's characteristic for the valves?


Please excuse my bad English!

Thank you very much for your help!

Best regards!

Jürgen