No 4 Verulam Ordnance Scale Rule 12 Inch (300mm)

• Ordnance Verulam scale rule 
• Professional quality
• Exceptional clarity and legibility
• Unequalled accuracy and design
• Material is chosen for its toughness and stability
• Imperial and metric dividings 
• Also available in 6" (150mm) length

12" (300mm) Dividings: 1:1250x1:2500, 1:10000x1:10560 (6"=1 mile)