Pair of folding aluminium binoculars, issued to officers in the Boer War, by Aitchison and Company, London, England, 1889-1910 Folding aluminium binoculars 1889-1910
Copper and brass inlaid with Zn in the sherardizing process Copper and brass inlaid with Zn in the sherardizing process
Steel hacksaw blade, sample of electron beam welding by Cambridge Vacuum Engineering, 1996 Steel hacksaw blade