A rare, Jas Rowe Birmingham, 4-Sided, Coopers?? Coggeshall Type Slide Rule, c1830, Boxwood & Brass, (Good).
Post 1826 as it also has Imperial Gallons marked. Obvious signs of age but pins/plates intact, good hinge, good slide though the thumbnail pull is worn. Dings and marks, and signs of corrosion to the iron tips.
Condition is used, signs of age - refer to photos and condition description.