Contains AE invoices from the 1960 and 70s. Trade literature brochures of telescopes and accessories. Astronomical equipment telescopes handbook. Engineering drawings of 16" (40cms) Cass-Newt reflector telescope, drawing Nos L1013/4. Data sheet 1702 : Variable frequency telescope drives. Price listing of standard telescopes 30 - 60 cms apertures. Pencil sketch drawings of 18" telescope for Croydon Astronomical Society. Monochrome photographs of 10�" Cassegrain motor drive and 12" Newtonian motor drive. Various correspondence from P. Norwich, Heston, Middx.