Six-fold linear measure, bone, Spanish, 1776

1776

Folding foot-rule with scales, 1780-1790

1780-1790

Brass folding graduated conversion rule

1798-1803

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