This boxwood and brass sliding gauge was used by a Victorian hatter. One wooden face is calibrated from 1 to 5 inches, and the brass slide from 5 to 10 inches. The reverse side of the rule has three sets of information. Size. 5 7/8 - 7 3/4 Length 6 5/8 - 8.5 and Width5 1/8 - 7. The rule is in first class condition; clear hand stamped numbers and no staining.