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Study this photo carefully
This course builds upon the foundational knowledge of the various Rickenbacker truss rod covers that you acquired during your undergraduate studies. These include gold, white, and black TRCs, as well as those with silkscreened and raised letters.
Let’s begin our discussion by examining a unique topic: the metal TRC. Who would like to volunteer to explain to the class what we’re looking at here? During what years, and on what models was this metal TRC used?
What's your answer?
Expert Answer
From @haulinkraut:
Combo 400 tulip models. Anodized type nameplate. Not sure exactly on years, but 56-57 seems right.