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1. Altazimuth Theodolite, by Benjamin Cole, London, c. 17502. HP-25 Pocket Electronic Calculator, by Hewlett Packard, Singapore,...3. Telefunken Radio Valve Type LD15 and Carton, by Telefunken,...4. Rotating Multiple Stamp Holder and Stamp, by E.M.R., London,...5. Speedometer and Odometer,with accessories by Elliott Brothers,...6. Marconi Ladies' Silver Pocket Scent Bottle and Stopper, by...7. Graduated Swivelling Coils For Triple Crystal Detector, Early...8. Jet Plates and Needles for Penicillin Extraction9. Set of Offset Drawing Scales, by William Elliott, London, 1830s...10. Sector, by William Elliott, London, 1830s or 1840s11. Rolling Parallel Rule, by William Elliott, London, c.183012. Stereoscopic Events Cameras for Particle Physics, by W. T....13. Culpeper Type Compound Microscope in Case14. Drum Microscope with Accessories and Case, English, c. 184015. Simple Microscope, English, c. 183516. Simple Microscope with Case and Accessories, by Charles Chevalier,...17. Rubber Tubing from Marey's Tambours or Sphygmograph18. Aural Tourniquet Capstan, by Savigny, c. 180019. 12 Volt Fleming Valve, by Ediswan, London, c. 190520. Marconi Radio Valve Type MT1, by Marconi Company, London, Early...21. Giant Radio Valve, by GEC, English, 1910s22. 4 Volt Fleming Valve, by Royal Ediswan, London, c. 190523. Manually Regulated Arc Light and Case, by Samuel Highley, London,...24. Brass Nameplate of Sir Henry Acland, ?1840s25. Winding key