Robert Kronfeld, Glider Pilot Autograph on attractive Mail from 1933 - col7726

Kronfeld passionately promoted gliding throughout Europe. He was one of the best known pilots at the end of the 1920s and beginning of 1930s.

He set many records and was the first pilot to use a variometer and among the first to utilize thermals to make the break through from slope to thermal soaring.

We also know him from his "traveling flying circus", air shows he performed in many European countries. He further is famous for his “Four-Country-Flight,” on which he carried official mail to and from each destination:
Robert Kronfeld, Glider Pilot Autograph on attractive Mail from 1933 - col7726