As I promised, I did some experiment with RGB LED's, trying to achieve that greenish blue (azure) original Marantz color... Failed miserably. Then decided to mix 3 warm white and 1 green LED's in the lamp and I think it's close enough. At least for the black faced dial scales. Still didn't test it on silver-faced Marantz:
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This is a great solution - a little more write up with part #'s - basically anything you have and people will thank you.