Item Title:
Staurt's 'Surcanrule' measuring tool for measuring stamps and postmarks. I. Ruler tool: clear plastic, with diagonal measuring scales, and a 'ROULETTES' box with perforation types illustrated. Inscription at base reads 'STUART'S SURCANRULE'. II. Paper 'INSTRUCTIONS FOR USE' sheet, with particular instructions on how to find the 'WIDTH OF A STAMP' and the 'DIAMETER OF A POSTMARK'. Accompanying illustrations.