Description
                
            
    
                    Triangular Scale Rule with White ABSColour Coded. TSR-2 Ratios: 1:20, 1:25, 1:33/3, 1:50, 1:75, 1:100
                
            Triangular Scale Rule with White ABSColour Coded. TSR-2 Ratios: 1:20, 1:25, 1:33/3, 1:50, 1:75, 1:100
