03 Mar CARL KELLNER HAS A PREMATURE DEATH
On May 13, Carl Kellner dies at the age of 29. The management of the Optical Institute is assumed by Kellner’s widow and an apprentice, Friedrich Belthle (1829-1869), who married her the following year and subsequently managed the company. At this time, it was a small business with less than 20 employees and a small workshop.