Surley the WMPTE daimler fleetline is the quentisential Bus for our area with over 2000 fleetlines in the WMPTE fleet. The earlier ones still had the birmingham corporation karki roof (of tram origins) - I know that your first thoughts are leaning towards Birmigham but in the 70's WMPTE's domination was all encompasing, Walsall, Dudley, Wolverhampton, Birmingham and all points inbetween. I was spotting Buses in the late seventies and the west midlands and the potteries was very much my patch. Midland Reds were a fraction of the traffic compared to the blue and creams.
http://www.flickr.com/photos/walsall1955/4652408066/
Andy