4548 Marine Navigation Proportional Divider

Model: 4548 Brand: Weems And Plath

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. Wt. 8 oz. « less