This is a vintage W&G model WG/A18TR engine-divided parallel drafting rolling ruler. High-quality precision-made in Australia, this clear acrylic drafting tool features dual scale increments marked with full and half measurements for technical drawings, navigation, or blueprint design work. The item is in used condition, showing superficial surface scratches, ink residue scuffs, and typical storage wear on the clear body and metal roller components. Please see photos for more details on the exact condition.