Thacher's Calculating Instrument, by Keuffel & Esser Co. 5152, patented by Edwin Thacher 1881. There are two sections where the paper has come off. The pieces that have been saved are in the last photo.Looks like the 2 longer sections will fit one of the areas. The pieces for the other section are incomplete. Please see all photos for condition of this rare piece. What you see in the photos is what you will receive. The item "Thacher Cylindrical Slide Rule by Keuffel & Esser Co, New York, Model No. 4012" is in sale since Sunday, July 12, 2020. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Engineering\Slide Rules". The seller is "mantolokingirl201" and is located in Toms River, New Jersey. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Panama, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.