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Wooden, cylindrical
Wooden (cypress) cylindrical shape
Just the right size to hold in one hand
Palm-sized
Engraved on one side
The raised parts of the letters or designs carved on one side are traced with the thumb to identify their shape.
Use thumbs
[W] Carving
By carving letters and designs into the [ W ]
The protruding part touches the pad of the thumb .
It is easier to distinguish than [V] and [U] .
[Patented]
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