I had a luthier made OM with Adirondack top. It had the darker wide grain striations I see in this one. Somebody told me on another forum that attribute causes the incredible sustain Adirondack is known for. That's a gorgeous instrument! Also, the ebony fretboard on my OM had a brown streak in it like this one. The luthier cut the ebony so the streak ran dead center on the length of the fretboard. He was afraid I'd be opposed to it but I thought it was beautiful as yours is.