Proportional Dividers

Proportional Dividers 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. Wt. 8 oz.