Set of four old rules. USA, France and England, 19th century.

Set of four old rules. USA, France and England, 19th century.
One parallel ruler, one brass ruler, three folding rulers.
In wood and brass.
Exhibits wear consistent with age and use.
Measurements: 0,8 x 17 x 3,5 cm (the largest).

Set of four antique measuring instruments for technical drawing, reflecting craftsmanship and precision: a ruler for making parallels, a slide rule or scale of proportions, three folding rulers of light wood (probably maple or boxwood).