Pickett 500 Ortho-Phase Log Log Slide Rule Orig Case 1940-1950s Collectible

This Pickett Model 500 slide rule is a precision vintage tool designed for engineers and mathematicians. It features durable construction, detailed scales, and includes its original protective case for safe storage and portability. • Model 500 Ortho-Phase design Serial number 3C08737 indicates it was made and used in the 1940s to 1950s Lightweight magnesium alloy with no corrosion 1950s style rounded metal corners fully functional • Includes original case for protection • Made in the USA during the post world war 2 era which was a time of innovation in engineering and science. It marks the moving away from wood and bamboo slide rules and itransitioning nto metal, leading up to the 60s when NASA began using Pickett slide rules because they were known for their tight tolerances Durable metal frame with yellow scales • Compact and portable engineering tool The back of the case has a chart from Eugene Dietzen Inc. which was applied in the past. both the Eugene Dietzen and Pickett & Eckel Co. are from Chicago. Minor wear and scratches on the slide rule surface. Case shows signs of age with scuffs. Fully functional. Size: Unisex 12 1/8" x 1.5" (2" w/ glide) Closed; Case is 12 7/8" long