The sans serif letterform of the 19th century evolved in many different ways by the end of the century. The first condensed forms, found in the 1830s in Britain, quickly spread all across Europe. Some of the most interesting examples were found in Germany and Switzerland. Often flat-sided, these Continental condensed sans serifs allow very tight setting, which was popular for headlines. These later became a staple of sixties headline typography in magazines such as Twen, the German style magazine art directed by the legendary Willi Fleckhaus in the 1960s, which is still an enduring influence on editorial design to this day. Berton Hasebe created Druk for Richard Turley when he was creative director at Bloomberg Businessweek, adapting the attitude and roughness of these old condensed sans serifs for contemporary use.