Anniversary 🎉🍾

We are proud of 140 years of quality and reliability.

Balz Zehnder takes over the company from his father Bruno Zehnder.

Bruno Zehnder (after 43 years) and Reto Job (after 36 years) are retiring.

The new generation is taking over.

Balz Zehnder joins his father's company.

Bruno Zehnder sen. will retire on 7 June after 43 years.

The PX88 sharpening steel is developed.

A top-quality product resulting from precise manufacturing techniques and state-of-the-art production technology.

It remains our best-selling sharpening steel to this day.

We are celebrating our 100th anniversary at the MEFA (Butchery Trade Exhibition) in Zurich.

At the same time, we are presenting our new logo.

Bruno Zehnder Jr. takes over K. Isler AG.

Hans-Kaspar Etzensperger takes over the company shares from Jakob Zehnder, who is retiring after 54 years.

The new company is called Zehnder + Etzensperger.

The public limited company K. Isler AG

is founded on 13 June 1977.

Bruno Zehnder Jr. joins K. Isler as a commercial employee.

Hans-Kaspar Etzensperger,

who later became the son-in-law of Bruno Zehnder Sr.,

joins the company J. + B. Zehnder.

The brothers Jakob and Bruno Zehnder take over Karl Isler's production. The general partnership J. + B. Zehnder is founded.

Karl Isler pays off his stepbrother Max Isler and founds the company K. Isler, Butchery Tools.

Karl Isler and Max Isler take over the production from Jakob Zehnder Sr., who is ill.

Bruno Zehnder joins his father's production.

Adolf Isler dies and his two sons Karl and Max take over the Isler Brothers trading company.

Jakob Zehnder runs his father's production for a year.

Karl Isler works in Lausanne and Paris for a year.

Karl Isler is doing a workshop internship.

Max Isler remains in Paris and establishes his own company, which later becomes the representative office of K. Isler AG in France.

Karl Isler completes a commercial apprenticeship in his father's company.

Max Isler works as a traveller for Switzerland and abroad.

Jakob Zehnder Jr. (aged 14) begins his apprenticeship in his father's production.

Jakob Zehnder takes over the production.

Adolf and Karl Isler (sons of the founder) establish the trading company Gebr. Isler.

Jakob Zehnder is brought back into the company as administrator.

Josef Isler dies, leaving behind seven minor children.

Jakob Zehnder works on his father's farm.

Josef Isler acquires a property with production, storage and office space at Wildbachstrasse in Winterthur.

Jakob Zehnder (15 years old) completes an apprenticeship under Josef Isler.

Josef Isler founds the company.