Vintage 3 Sided Triangular Engineering/Drawing Ruler &Scale Ruler

Scale Ruler Stanley Wooden Cws Feet Equal 1/50 1/20 Metre Rare Vintage

Vintage A.W.Faber Castell 3 Sided 873c/Z4 Engineering Ruler & Case

Cooke Troughton & Simms Engineering Slide Rule Vintage Collectable

Vintage Blundell Harling Academy “A” 3-sided Drafting Ruler

Vintage 3 Sided Triangular Wh Smith BS 1347 Ruler In Good Condition

Vintage A.W.Faber Castell 3 Sided 873c/Z4 Triangular Ruler With Case

Vintage A.W.FABER "Castell" Wooden Ruler 1/87 Syst. Rietz