The black & red shirt which we wore from the late 60's onwards was the brainchild of maverick assistant boss Malcolm Allison, who sought to emulate the style and success of AC Milan. As it turned out, the experiment was a roaring success, we wore the change strip against Leicester when we lifted the 1969 FA Cup Final, then in their ensuing 1970 ECWC Final victory in Vienna against Gornik Zabrze and, just nine days later, in their League Cup win over West Brom.
The Milanese look has kept cropping up in various forms as City’s second or third kit including the 2011/12 Premier League title season success.
Rumours coming out of Puma are that next season's away shirt were be a tribute to the black & red style or possibly even the early 70's sash kit.