Product code: Vintage Keuffel & Esser (K&E) 4081-5 Slide buy Rule 20-inch Mahogany Copyright 1947
Keuffel & Esser (K&E) 4081-5 Log Log Decitrig Duplex 20-inch Mahogany Slide Rule Copyright 1947 Bottom of leather case has slitx Slide rule slider has buy chips (see photos) Booklet has cracked slit at the foldef back cover Box has cracks and one end of box is missing. Metal ends are slightly tarnished with age.
Keuffel & Esser (K&E) 4081-5 Log Log Decitrig Duplex 20-inch Mahogany Slide Rule Copyright 1947 Bottom of leather case has slitx Slide rule slider has buy chips (see photos) Booklet has cracked slit at the foldef back cover Box has cracks and one end of box is missing. Metal ends are slightly tarnished with age.