Jon Pohlman

Jon Pohlman

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Square ruler, same thickness, silver, 1 shaku (approx. 30cm), square grain on th

Accuracy ●Perpendicularity: 0.1mm or less per 100mm ●Length tolerance: ±0.2mm or less Front scale ●Long arm: Outer scale 1 shaku, Inner scale 7 sun ●Short arm: Outer scale 5 sun, Inner scale 3 sun. 1 ~ 2 weeks.

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