Different Sylvania 6CG7 tubes

Tubes Asylum

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One tube has yellow lettering with Sylvania, Made in USA, ae AMMM and 6CG7 and 6FQ7 silkscreened on it. The other has red lettering with Sylvania, its logo, U.S.A. and ea, AAO. Both are chrome topped with grey plates.

Any difference in sound, age, etc? Anyone know what ae vs ea, AAO vs AMMM mean?
Thanks,
Bob

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Topic - Different Sylvania 6CG7 tubes - Bob Mc 03:40:43 07/02/08 (0)

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