Folding Parallel Rule

Invented by teacher Jennie Zaches in 1939 who founded the C-Thru Ruler company in USA.

This revolutionised measuring in drafting and drawing.

Used in chart plotting.

Lightweight.

Non skid cork pads.

Non magnetic, anti-corrosion resistant metal parts.

Positioning knobs can be adjusted.

Bevelled side edges

Genuine manufacture by The C-Thru Ruler Company -Bloomfield USA

Dimensions:

• Length: 380mm or 15inches
• Closed width: 64mm