Slide Rule Collection * Dietzgen o 1732 Maniphase Multiplex o 1733 Polymath o 1735 Maniphase Multiplex o 1738 Multiphase o 1779 Pocketlog * Faber Castell o 2/82 Duplex o 1/54 Darmstadt o 57/87 Rietz o 375 o Unknown model (360?), ca. 1900 * Hemmi o Hughes Owens 1777 Versalog o Hughes Owens 1776 Versatrig o Hughes Owens 1773 o Hughes Owens 1771 (several versions) o Hughes Owens 1768C o Hughes Owens 1765 o Hughes Owens 1763 o Hughes Owens/Geotec 341 3050 Pocket Versalog o Hughes Owens/Geotec 341 3120 Versatrig o Hughes Owens/Geotec 341 3425 o Hemmi 130W Darmstadt o Post 1441 * Keuffel and Esser o 4053-3 (several versions) o 4058W o 4080-3 o 4081-3 (several versions) o 4083-3 (several versions) o 4088-3 o 4091-3 o 4092-3 o 4100 Stadia * Nestler o Nr. 0130 Multimath-Duplex o Nr. 0210 Darmstadt o Nr. 0292 Multimath-Duplex * Pickett o Model 4 o N4-ES (several versions) o N515-T Electronics Rule o N600-ES Speed Rule o N1010-ES o Microline 140C-T o Microline 160C-ES/T * Miscellaneous Linear Rules o Aristo Studio Nr. 0968 o Ecobra 1461 o Engineering Instruments 10-B o Kutsuwa 1004 o Lawrence Engineering 8-B o Lutz No. 252 o Russian Rule, 1969 o Russian Rule, 1978 o Staedtler 544 28 o Sterling/Acumath 400 o Sterling/Precision (unnumbered) * Circular and Combination Slide Rules o ALCO Addiator with Slide Rule o ASA E6-B Flight Computer o Concise No. 28 Circular Rule o Concise No. 300 Circular Rule o Otis King Model L Cylindrical Rule o Sterling Silver Tie Clip * Slide Rule-related Paraphernalia o Aristo ruler Nr. 1369 o Dietzgen surveyor's hand level o Hughes Owens ruler 324-1125