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| Middy Bar Parallel 400 mm
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| Capt. Field Pattern 400mm
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| Capt. Field Pattern 500mm
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| Capt. Field Pattern 600mm
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| Portland Triangle 200mm
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| Portland Triangle 230mm
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| Portland 7 S/H Divider
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| Portland 8 S/H Divider
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| S.T.D. Slide Rule NATO pattern
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| S.T.D. Calculator
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| Portland Course Plotter
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| Tidal Dept Estimator
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| Tidal Dept Estimator 208x140 mm
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| Rib Plotter 190x140 mm
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| Flat Acrylic 1 metre Rule with mm/inches
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| GPS Plotter
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| Portland Navigatsional Plotter
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| Portland Protractor Small 125 mm
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| Portland Protractor 250mm
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| Brass Rolling Rule 450 mm
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