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RE: The code (factory) you circled looks to be Chelmsford...




The codes are upside down and only the first line is clearly visible.

The first line reads 163. 16 (or I6) is the code for a 12ax7 and the 3 means of the 3rd construction type. It's the first character in the second line that denotes the plant of manufacture. I can't read the second line.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"



Edits: 07/12/12

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