Coral stitch is also known as coral knot, German knot stitch, knotted stitch, beaded stitch, and snail trail. It is also incorrectly known as scroll stitch. Coral stitch is frequently found in seventeenth and eighteenth century English crewel work.
That's what my group taught children at Public Day at School of Arts and Design in Finland! I never knew our idea had a real background, we just wanted to show the basics behind weaving but in a miniature way!