SECTOR OR PROPORTIONAL COMPASS. SCIENTIFIC DRAWING INSTRUMENT. VERY GOOD.

Vintage TRANSFORMING COMPASS DIVIDERS PEN SET by American Pencil Co. 4½" in Case

Vintage Faber Castell Slide Rule in nice condition

Vintage A.W. Faber “Castell” Slide Rule Model 360 PAT. No 206428 made in Bavaria

Antique Wooden Boxed Draftsman’s Drawing Instruments Set In Brass & Steel

Faber-Castell 2/83N Novo-Duplex Slide Rule Germany Case & Instructions Excellent

Faber Castell 57/87 Students Advanced Rietz Model Slide Rule Made In Austria

Old Vintage Leather Case Load Adjuster US ARMY AIR FORCES - NO SLIDE RULE