In 1931, the 100th anniversary of the Heckel company took place. Franz Groffy developed a variety of useful mechanisms for Heckel instruments, which he published in a self-created catalogue on the occasion of the company’s 100th anniversary.
100th Anniversary of the Company
![](https://heckel.de/wp-content/uploads/2019/01/Heckel-Katalog-1.jpg)
Catalogue for the 100th anniversary of the company