Aitchison & Company, London collapsible binoculars. Made of aluminum, they are an early example of the use of the metal in the manufacture of lightweight optical instruments. Unlike modern instruments, using prisms, these binoculars produce an upright image by employing a pair of Galilean telescopes with large convex front lenses and concave ones for the eyepieces. Issued to British officers serving in the Boer War Measure 5' x 2" folded and 5" x 4.5" unfolded. Good overall condition. markings read "12 Lenses Aitchison's Patent 1016 London England". In house continental USA shipping $25 plus insurance.