37432899___Straight_Razor_Place_Library__Comments
[Name] Nakayama [Typical use] finishing/polishing [Comments] 
Nakayama is the name of the quarry the razor finishing hones come from. The quarry has been closed since 1967, so the stones are very expensive not only because of their fine quality. These are very hard and mostly slow cutting stones but some examples do have fast cutting power; watch the description.
Hones - comparison table - Straight Razor Place Library
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