This one is 21 inches long and is in its original mahogany box.
Used in charting and recording a course, the roller rule was standard issue for Royal Navy ships during World War II, taking the place of conventional split rules for many navigators. Any mariner who has used it knows how handy it is. This one is 21 inches long and is in its original mahogany box. It was made by the H. Hughes Company of London and is so marked. In pristine condition, made of bronze, it can be handsomely shined for presentation. You will appreciate the quality.