These were bought from a respected seller in the US.   As you can see ,they were made 11/1962 and he provided test results that are written on the plastic bags.

They were given a brief trial run in my system to ensure their workings but put in cupboard to play with later.

I have now moved to a non tubed dac/ preamp  ,hence the sale. These are a bargain for NOS Telefunkens

 

 

Edited June 5, 20232 yr by Jeffro

Would you have photo of the bottom of the tube?

Just added.  Not the clearest photo so let me know if you need more