Handbook for the Maxim Nordenfelt 3-Pr. : quick firing gun : mark I ATM. Rythmatic control, enginering bulletin 2185 ATM. Vehical actuated detectors ATM. Electric vehicle actuated signals, From Cornhill to Paiccadilly circus Barr & Stroud. Infra-red materials Barr & Stroud. Cryogenic air supply unit QK4 Barr & Stroud. Laser rangefinder Barr & Stroud. Thermal imaging sensor head Barr & Stroud. Thermal imaging fire control systems Barr & Stroud/Lasergage. Helicopter infra red system Barr & Stroud. Pacesetters Barr & Stroud. chalcognenide glass type I, For optical elements in infra red systems