In 1819, Heinrich Köchert joined in as an associate (he was from a German family of carpenters[2]), and married Pioté's step-sister.

When the emperor Francis II contracted Pioté and Köchert to create a golden box for the ambassador, the shop became the first official jeweler to the King («Kaiserlich-Königlicher Hofjuwelier»).

The goldsmiths also made the 27-star crown for Empress Elisabeth of Austria (the «Sisi Sterne») that launched a new fashion in Europe.

Alexander Emmanuel Köchert was tasked in 1844 with adding pearls to the Imperial Crown of Austria.

[5] The royal crown of the Empress Elisabeth made by Köchert was stolen in 1998 by Gerald Blanchard, and recovered 9 years later in Winnipeg, Canada.