I recently acquired a used Collings MT. Plays and sounds great. The top has a feature in the wood that I've not seen before. The grain of the wood seems to have a circular pattern in some places. Almost a smudge, rather than lines running in parallel. This seems to happen in bands about 1-2 cm wide running the length of the top. One on the treble side and one on the bass side, but not exactly symetrical. I see the same thing on an MT shown on the Collings website. Any explanations?
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