In 1854 , Carl Spangler joined the company and one year later married Duregger 's daughter .
The banking house was founded by Johann Alois Duregger , who applied for commercial banking authorization in 1828 .
In 1854 , Carl Spangler joined the company and one year later married Johann Alois Duregger 's daughter .
The banking house was founded by Johann Alois Duregger , who applied for commercial banking authorization in 1828 .