EL84's Who Made These???

[racfan9]

I've got a pair of 84's that I'm trying to figure out the manufacture. There made in Holland and they have date codes on the bottom, (see photo)if you can't read it the code is rX3 Any clues out there.
X9A

racfan9

 

[EliFisk]

Amperex EL84 tubes

http://www.thegearpage.net/board//showthread.php?t=1232355

 

[racfan9]

Thanks for the info. So they are Amperex tubes, can someone decipher the codes rX3 X9A, Also whats the Amperex Bugleboy?

Thanks,racfan9