Hughes-Owens Model 341 3526 Duplex Slide Rule by Hemmi Japan with Original Case
Hughes-Owens Model 341 3526 Duplex Slide Rule by Hemmi Japan with Original Case
Hughes-Owens Model 341 3526 Duplex Slide Rule by Hemmi Japan with Original Case
Hughes-Owens Model 341 3526 Duplex Slide Rule by Hemmi Japan with Original Case
Hughes-Owens Model 341 3526 Duplex Slide Rule by Hemmi Japan with Original Case