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Vintage Weems system of navigation precision 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. In perfect working condition. Stamped on one side is: "C 1953 WEEMS & PLATH, INC DIVIDER SET - FSN 6605-682-4548".
The black case is marked: "MADE IN W. GERMANY".
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