Four (4) Keuffel & Esser (K&E) slide rulers, including one (1) 4105 Webb's Stadia rule, one (1) Reymond Leather Calculator, and two (2) Merchant Desktop models. 1st item: 4105 Webb's Stadia rule, designed by Walter Loring Webb. Comprised of a wooden cylinder covered with paper scales, wooden handles at the ends of the cylinder, and a metal sleeve lined with felt. The sleeve, which is painted maroon, holds the cylinder. Maker's marks to paper scales. 15 3/4" L. 2nd item: Reymond Leather Calculator, copyrighted and patented by M.H. Reymond, designed for use in calculating the amount of leather in sq. feet needed for a run of shoes based on size, width, quantity, and type. Comprised of one-sided celluloid laminated mahogany with three sliding scales, two with brass thumb screws, four stationary scales, and three metal pointers, all mounted in a mahogany box with a hinged lid and brass hardware. Maker's marks, front. Calculator - 3 1/8" H x 22" W x 1/8" D. Box - 2 1/4" H x 22 1/2" W x 4" D. 3rd item: 68 1748 Merchant's Mannheim Desk Model, serial number 830026. Comprised of one-sided celluloid laminated mahogany with one slide scale and metal thumb screw, two stationary scales, two glass cursors with metal frames and white celluloid edges held together with metal screws, all mounted at an angle in a grey, Morocco case with a hinged lid and metal hardware. Maker's marks, front. Slide rule - 21 1/2" L. Case - 2 7/8" H x 22 1/2" W x 4 1/4" D. 4th item: N4096 M Merchants Rule, serial number 034880. Comprised of one-sided off white celluloid laminate mahogany, laminated paper label to back, plastic cursor with metal frame and white celluloid edges held together with metal screws. Maker's marks, front. Includes a black leather case and original green box. Slide rule - 21 1/2" L. Case - 23" H x 2 3/4" W x 1 1/4" D. Box - 23 1/2" H x 3 1/8" W x 1 3/4" D. All items early/mid 20th century. Provenance: Private West Tennessee Collection. CONDITION: All items in overall good condition. 1st item: Foxing spot/toning to paper scales. Craquelure, areas of loss to paint on sleeve. 2nd item: Calculator and box with wear. Box with inscriptions to interior of lid. 3rd item: Case with wear. Cracks, breaks to celluloid cursor edges. 4th item: Case and box with ink stamps from previous owner. Box with wear, areas of white archival tape repair.