PSL Japan #150 Slide Rule Calculator with Case Vintage Engineering Tool

Vintage P.S.L. #150 slide rule, a classic tool for engineers, students, and collectors. This slide rule is designed for performing mathematical calculations with precision and ease. It comes complete with its original case, offering protection and portability. A piece of history, this slide rule is not only a functional instrument but also a collectible item that reflects the ingenuity of past engineering practices. Keywords: slide rule, vintage slide rule, P.S.L. #150, engineering tool, calculator, mathematical instrument, collectible slide rule, vintage calculator, analog calculator, technical drawing, drafting tool, engineer gift, student tool