By 1900, Heckel had produced around 4.000 bassoons and 3.000 other woodwind instruments. With the exception of minor changes to the bore and key mechanism, no significant changes have been made to the instruments. In particular, a consistent fingering was very much in the spirit of musicians and used to promote a worldwide distribution of Heckel instruments.
Production and Orders

Overview of Heckel Instruments

Overview of Heckel Instruments
1902 saw the first major contract for the Heckel company from Japan. A total of 54 Heckel instruments were ordered to equip the imperial court orchestra in Tokyo.

Major order from Tokyo

Major order from Tokyo