Dear cyclers,

I'm new to this forum because I wanted to share a bike with you that I tried to identify for some time now.
Here are some pictures:

(see attached)

The frame has the serial number 173814 under the bottom bracket.
The main label (Francis) pointed me to a cycle shop in Freiburg (Germany) and it's owner Francisco Garcia. He seems to be from Portugal or Spain but unfortunately I wasn't able to get into touch with him. I also don't know how common a frame-building cycle shop-owner is, or maybe he built it in former times.
The sticker on the seat tube is quite damaged and I could not identify it. Parts of it say PRÄZS and quality. Maybe anyone has seen it before.

It would be nice to hear your ideas and maybe gain some more knowledge about the bike!

Have a great day!
Jens