proportional dividers
 

Proportional Dividers are a highly accurate speed-time-distance computer, long used by draftsmen and chart makers. Its unique advantage is that distance, picked off the chart between divider points, can be immediately converted to the unknown speed or time. Made in Germany of silver/nickel alloy with stainless steel points, 8 inches long. FSN 6605-00-682-4548.


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Proportional Dividers
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Proportional Dividers

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