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1960 Texaco Marine Products Lenticular Passing Whistle Signals Nautical Ruler
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This lot is a vintage 1960 lenticular ruler produced by Texaco Marine Products (a division of Chevron). The ruler uses a lenticular change to show how boats should pass one another in various situations. The back of the ruler includes written instructions for the whistle sounds that should accompany any passage. The ruler is scaled to measure nautical miles on two different types of charts.

The ruler is approximately 7.5″ long by 1.5″ wide.

All our items are kept in a smoke-free and pet-free environment.

This vintage nautical ruler is in very good condition with minimal signs of wear. It has a slight curve. Please review the included photos of the actual item to make a complete determination of its condition.


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