u/Helassity

Hi all. I found this card in my late father's belongings. The handwriting is his own — I'm Serbian myself but his writing is hard to read even for me. It's connected to old family business in Switzerland, Any help appreciated, even partial reading thanks

https://preview.redd.it/h7vzbily3e1h1.jpg?width=1200&format=pjpg&auto=webp&s=9c65128bcfa1ac16792535d2c2693bbfcd5e8dca