Staedtler-Mars 12” Triangular Scale Ruler 987 18-34 Engineer Germany Color Bars

Staedtler-Mars 987 18-34 Triangular 12" Scale Ruler Engineer Germany

Staedtler-Mars 987 18-34 Triangular 12" Scale Ruler Engineer Architect Japan

Staedtler-Mars 987 18-34 Engineer Triangular 3 Sided Ruler Colors Japan

Staedtler-Mars 12” Triangular Scale Ruler 987 18-34 Engineer Japan

Vtg Staedtler Mars Engineer 12" Triangular Scale Ruler 987 18-34 Japan

STAEDTLER 12in Engineer Scale Ruler - Triangular Engineering Ruler with 6 Scales

Staedler Mars Engineer Ruler - 987 19-34 - Made in Germany