Vintage Celestion Greenback CRASH COURSE!

In this clip I go through the versions of the 1960s and 1970s G12M and G12H Celestion Greenbacks. I focus on the versions of G12M25 and G12H30 that existed between 1968 and 1980.

The extended text complementing the clip will be posted in a couple of hours. Cheers Johan

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