His face appeared on the old ten Swiss Frank note, adorns a special stamp, and now also sets a watch apart: Oris is launching the Leonhard Euler jubilee watch to commemorate the 300th anniver-sary of the birth of the great Swiss mathematician. Leonhard Euler (1707-1783) pioneered natural science, laid the foundations for modern technol-ogy, and ranks on the level of Newton and Ein-stein for productivity.