Siemens Halske versus Siemens Rohre

The tubes on E-Bay appear to be genuine early 60s.

I have bought similar (as the ebay link above) tubes off ebay upon a tube expert's ( that I highly trust) suggestion and it turned out to be the best tubes(Early sixties Siemens CCa) I have tried so far on my DAC. Thus leaving up to its reputation as one of the best tubes. Since then I also have bought a pair of 50's grey d getter Siemens CCA and performance is consistent with the reviews. Leads me to think that these are genuine tubes. Just another vote of confidence.

Thank you all for your comments. Nilthepill, you you mean that you bought your cca's from the same seller referenced above?
Joe

Gammajo, No I don't think it was the same seller, but description, picture , characteristics are same same as when I bought mine just few weeks/months ago. Note that I said " similar". I should add that I should be "liking" the 50's tubes, but for may taste I much prefer the early 60's CCa's. You did not ask for this, but I might as well say it and add to more confusion ;-)

Nice link Tvad. I have 4 pairs of the early gray riser Siemens( some call them gray plates) and all have the codes on the glass but one.
But they are ECC88 not CCa, although CCa are said to be the pick of the litter from ECC88.

Semens & Halske E88CC

Characteristics:

- double stage getter

- AØX ≠XX code on getter support

Comment:

Quite rare.

That is the info from the website. I think a bit of an oversight as most I have seen that have the codes on the getter support are the silver riser.

I have 8 tubes with the AØX ≠XX code. 7 being gray riser with code on glass and 1 gray riser with code on getter support.

Go figure!

I also found the ECC88 gray riser to be better then the later CCa silver riser. YMMV

This is my favourite tube from the 6JD8, 6922, 7308 family.