A northbound suburban electric train emerges from the tunnel at Waverton on Sydney's North Shore in the 1960's. The "Red Rattlers" were for decades the standard suburban train on the Sydney network before the arrival of double-decked carriages in the 1960's. The train depicted is actually one of a limited number of "Sputnik" sets built complete with powered doors. Earlier single decked electric multiple units offered the delights of manually opening sliding doors, often left open in warm weather to aid the otherwise limited ventilation.