Four Folding Ivory Rules
1. Two Foot four fold, no maker, metric and London inches £130
2. Eighteen inch rule, no maker, French and English inches £130
3. J Rabone & Sons, One foot, £110
4. Baker, 244 High Holborn, London four fold two foot rule chamfered £190
Cannot be shipped outside Uk and EU
Ask the Dealer
Fletcher Wallis sells objects and books relating to the history of science, medicine and technology from his unit at Admiral Vernon Arcade Portobello Road. He publishes books through Vernier Press, including Antique Medicine Chests, and Corkscrew Patents from 1795. He has been dealing for thirty five years.