The Bristol GT 407 Z was a concept car built by Zagato in 1960. The GT 407 Zagato coupé was a styling exercise displayed at the Turin Motor Show but was not developed as a production series. It entails good use of side and rear glazing, leaving a very slim rear ¾ pillar, which permits excellent all-around visibility.
Source: ht.boc.net
Images: Zagato