Antique Slide Rule Keuffel & Esser Co. NY Model #4054
- Source: eBay
You are bidding on an antique slide rule made by Keuffel & Esser Co. NY, model #4054. The slide rule is in mint condition, is 12" long and comes with a leather case. The patent number is 1,934,232. Enjoy this item and good luck bidding!