Seems like everything used 5AR4 tubes ............things change...... and this pair of tubes was bought to try in an amp.I stayed with the tubes i was using and these are basically NOS minus about ten hours.Really nice tubes sweet and airy and just right for any amp that might call for a great pair of 5AR4/GZ34 tubes.These date from 1969 Blackburn plant manufactured 1969 RCA branded RCA boxes.
Looking for 225.00 for the pair plus 15.00 shipping.No paypal fee.
