Barr & Stroud. Pacesetters Barr & Stroud. chalcognenide glass type I, For optical elements in infra red systems Barr & Stroud. Data sheet, Passive night telescopes CU17 and CU18 Barr & Stroud. Calcium aluminium glasses, For infra red optics G.E.C. High intensity runway light G.E.C. Low intensity appraoch light list Fixed and semi-adjustable resistors / British Electric Resistance Co (BERCO) list Rotary type rheostats and potentiometers / British Electric Resistance Co (BERCO) léger char blindé Garden-Loyd M. VI ATM. Street fire alarm and ambulance systems. ATM. Electro-matic vehical actuated signals, pneumatic type detector ATM. Strowger, Ten-line private automatic telephone exchange equipment