Company Seven has few resources in our archives to indicate whether or not Carl Zeiss had adopted any company trademark or not when the company commenced production.
The earliest example we own of any item identified as having been made by Zeiss is the compound microscope shown above.
This is near the Saale River in the district of Thuringia in Germany.
Here he commenced production of simple microscopes, measuring instruments, and other precise optical and mechanical instruments.
Preface: going on-line in 1994 this is among the first and earliest on line articles about Carl Zeiss, and is written entirely with a simple text editor.