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Original Message
RE: Does anyone know these tubes?
Posted by protube@googlemail.com on June 16, 2017 at 02:51:54:
Hello,
Sorry for the delayed answer.
I have locking about the numbers in glass bottom.
Tube pic 1 and 2: yes a number 7
Tube pic 3, 4 and 5: yes looks like a star with 2 lines and 2 dots,
Left tube with number 16, right tube with number 4. (see photo)
Tube pic 6 and 7: no number
Tube pic 8 and 9: no number
Tube pic 10 and 11: yes looks like a Z or N, number 22 between pins 1 and 9 (see photo)
Tube pic 12: no number
Best regards,
Heiko