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THACHER'S CALCULATING INSTRUMENT K & E KEUFFEL & ESSER!
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THACHER'S CALCULATING INSTRUMENT K & E KEUFFEL & ESSER!
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IS A VERY RARE FIND...THACHER'S CALCULATING INSTRUMENT BY KEUFFEL & ESSER (K & E)!! In pretty nice original vintage condition as you can see. The case shows some wear at the top and bottom (splits/cracks in the wood) but still holds together fine. is what I found about this instrument: In 1881, Edwin Thacher, an American bridge engineer patented this cylindrical slide rule, 4 inches in diameter and 18 inches long. In 1882, scales were divided for Thacher's instrument by W. F. Stanley of London.The cylindrical rule can be both rotated and moved horizontally within an open network of 20 pairs of scales, mounted on metal bars, the open network itself also capable of rotating as a unit. The 20 scales afford the instrument an effective length of 30 feet, and an accuracy of 4-5 digits. Scales for square roots were also included. Mounted permanantly on the mahogany base is a brief set of instructions. Thacher's Slide Rule was produced by the famous Keuffel and Esser Company of New York (Model No. 4012). This instrument is Serial Number 4712. Apparently, this originally came with an instruction manual, however, it is not included This item is sold as-described, as photographed and t is NO RESERVE!! SHIPPING: Winner bidder pays $25 flat rate shipping fee via Fedex Ground; this will include insurance and tracking#. Please provide phone number at conclusion of auction. PAYMENT: Payment preferably by cashier's check/money orders within 7 days of auction close. Will accept Paypal unless otherwise stated. If payment is not received in the alotted time period, a NON-PAYING BIDDER ALERT will be filed and negative feedback posted. RETURN POLICY: No returns unless item was received different than stated in the description. Thanks for viewing my auctions and Good Luck!!!! The free listing tool. List your items fast and easy and manage your active items.
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