Vintage Pickett N600-ES Dual Base Log Log Pocket Slide Rule in Original Box with Leather Case, instructions and slide rule guarantee. Condition is Used. Shipped with USPS First Class.Slide rule in excellent condition. Box has some damage (see photos). Some minor superficial scratches and smudges. Some of the screws have tarnish. Case has some wear scratches and creases as pictured. Case pocket Clip has strong spring action. Please see pictures for more details and contact seller with a...ny questions or for additional photos.