The Helix Oxford Mathematical Instruments
Metal Compass
Protractor 10cm (180 Degrees)
Mathematical Instrument Set AH1210
Uchida Fan Scale Ruler
Triangular Scale Ruler
Fan Scale Ruler
Flexible Curve Ruler 40cm
Thick Plastic Ruler (8 - 24 inch)
Stainless Steel Ruler (6 - 40 inch)
Plastic Ruler (6 - 12 inch)
