Identifying NOS Siemens Tubes

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Can anyone please help me identify a pair of NOS Siemens tubes with the lettering almost vanished?
I bought them as E88CC (6922) tubes, but they are different to the other NOS Siemens E88CC tubes I have.
It is possible to read the letters Â«E8....Â» on one of the tubes. Inside, the metal is stramped Â«A6Â» and Â«7FÂ» on both tubes. To me they look similar to other Siemens E88CC tubes, except for one thing: They only have a thin rod with a circle on top above the main (gray) section, while the others also have a narrow piece of flat metal bent somewhat like an Â«AÂ» between the main section and the top ring.
The tubes that I know are E88CC, have codes like this:
Â«A4/9FÂ», Â«A4/8GÂ» and Â«A3/8AÂ»

I am afraid to use these tube in my preamp before I get to know what the really are. Please help!!!
erlandsen

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Topic - Identifying NOS Siemens Tubes - erlandsen 03:33:22 09/21/04 (8)

Siemens codes - JFB 05:42:10 09/22/04 (0)

More info ) not much help though )) Re: Identifying NOS Siemens Tubes - ruffscruff 11:58:03 09/21/04 (0)

Re: Identifying NOS Siemens Tubes - Meister 05:27:54 09/21/04 (5)

Re: Identifying NOS Siemens Tubes - erlandsen 05:57:48 09/21/04 (4)

Re: Identifying NOS Siemens Tubes - 254mm 07:52:12 09/21/04 (3)

BTW 254mm - The picture you posted above is ours (nt) - tubemonger 08:39:33 09/21/04 (2)

Re: BTW 254mm - The picture you posted above is ours (nt) - 254mm 09:36:45 09/21/04 (1)

Cool - no prob at all. - tubemonger 09:47:36 09/21/04 (0)

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