Standard commercial school issue.
Commercial Square Protractor
S$11.00 Regular Price
- 128mm square.
- 0-360 scale on outside edge with reverse 360-0 scale adjacent.
- Intercardinal points (NE, SE, SW, NW) on corners.
- With aeronautical symbol cut-outs of a square, circle and triangle.
- Centre drilled for location and gridded in squares of 13mm(4nm).
- Supplied in a self-sealing clear plastic case.