[1] In 1847, Christian August left the company to start his own, "C. A. Seydel", which was founded on 27 October 1847 as decreed by the court of Untersachsenberg.

The 1847 Classic, Silver, Noble and Lightning models of diatonic harmonica all receive their names based on the year of the founding of the company.

After Kurt's death, Hugo Götz, husband of Georg Ernst's daughter Frieda, continued to run the business until it was nationalized around 1950.

The following year Richard's brother Moritz joined the company, since then called "C. A. Seydel Söhne".

[6][7] By the time the 1920s rolled around, C. A. Seydel Söhne had employed 800 factory and home workers, with annual production exceeding seven million harmonicas.

However, after the fallout from the Great Depression, Seydel merged with F. A. Rauner, F. A. Bohm and AG to form Rauner-Seydel-Bohm-AG in order to survive.

In 1939, the beginning of the Second World War, Hans Hugo Bischoffberger was called up to join the army.

In his place Margarete Seydel and Hedwig Bischoffberger (wife of Hans) become the chairmen of the company, running it for the duration of the war.

C. A. Seydel Söhne found themselves under Russian occupancy, the company declared to be under government administration.

Following the bankruptcy, the company was bought over by NIAMA Media in 2005,[9] which makes it the oldest harmonica manufacturer in the world.

Aside from the luxury components and extra attention to every detail the biggest feature is the use of polished steel reeds.

Session Steel - This model has an orange plastic comb (or other colors if it is a Summer or Winter edition harmonica).

Soloist Pro - This model is similar to the Hohner Marine Band 1896, but with rounded holes and screws.