Brass folding graduated conversion rule
1798-1803
Folding foot-rule with scales, 1780-1790
1780-1790
Six-fold linear measure, bone, Spanish, 1776
1776
Surveyors conversion rule by Stanley
1875-1900
Brass combination rule signed "Patron a Paris"
1780-1820
Boxwood scale with 37 different countries and towns' comparative measurement of the foot
1800-1805