Keuffel & Esser K-E 4081-3 Engineer’s Slide Rule In Leather Case

Keuffel & Esser K-E 4081-3 Engineer’s Slide Rule. Comes in leather case. Slide rule is 12”. Slide rule slides easily and is in generally good condition. It has a name and initials engraved on metal ends. It has some rust marks from slide. Case has some tape, writing & wear. W05