Vintage Keuffel & Esser Paragon 1631P Triangular Scale Drafting Ruler

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Adjustable Compass Ruler - Precision Circle Drawing for Woodworking & Drafting

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Alvin 244B Drafting Engineer Scale 12” Triangular Ruler W/Case Bamboo Japan Used

Vintage Keuffel & Esser Paragon 1631P Triangular Scale Drafting Ruler

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Vintage Keuffel & Esser Paragon 1630P Drafting Ruler Wood & White & Engineer C2F