Hello fellower. Up for immediate Buy-It-Now Sale is one ~(1)~ scarce old original accessory: KEUFFEL ESSER BEGINNERS SLIDE RULE. This neat early Slide Ruler was high-quality old school USA made of wood with the original instructions/storage case by Keuffel Esser Co. of N.Y. PLEASE READ: Customer satisfaction is our goal, so IF there is a problem with your order, please contact us before opening an dispute or leaving Feedback. CONDITION: Ruler is in great condition. Pervious Owner did write his name on the inside. SEE PICS for account details . Instructions are torn at the bottom but overall good shape