The core activity of Mini Service 77 GmbH encompasses a wide range of services and sales products, primarily focusing on the following areas: 1. **Shoe Repairs**: Repair and restoration of shoes, including soles, heels, tips, and edges, as well as adhesive work and the construction of new insoles. 2. **Key Service**: Production of key copies for car keys, house keys, safe keys, cylinder keys, old cast-iron keys, and mailbox keys. 3. **Engravings**: Creation of engravings on various materials such as glass, plastic, metal, wood, etc. for signs, logos, coats of arms, and individual designs. 4. **Printed Materials**: Production of business cards, flyers, and other printed materials in various formats and designs. 5. **Watch and Battery Service**: Replacement of watch batteries and repair of watches. 6. **Sale of Products**: Sale of knives (Victorinox and Wenger), scissors, watches, and comfortable shoes from various brands. Overall, the company offers a broad range of services and products, focusing on shoe repair, key service, engravings, printed materials, watch and battery service, as well as the sale of products.