HO Sydney Suburban Sputnik MK. 1 Citydecker w/ yellow doors1 x Power Car (motorised), 2 x Tulloch Double Deck Trailers, 1 x Power car (Dummy) The Mk. 1 series of suburban cars where all cars were of double deck design. This set replaced the Sputnik power cars (single deck) with double deck stainless steel power cars. This set represents the last era of this set combination and livery was changed to stainless steel power cars, grey trailers, all doors painted safety yellow.