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Brass folding graduated conversion rule

1798-1803

Surveyors conversion rule by Stanley

1875-1900

Folding foot-rule with scales, 1780-1790

1780-1790

Six-fold linear measure, bone, Spanish, 1776

1776

Brass combination rule signed "Patron a Paris"

1780-1820
Boxwood scale giving comparative measurement of the foot of 37 different countries and towns on one side and ells etc. on the other, c.1800

Boxwood scale with 37 different countries and towns' comparative measurement of the foot

1800-1805