Unable to answer "What are the opening hours here?" – Dell Rossi Men's Wear (Clothing Store) – https://osm.org/way/560638863 via StreetComplete 58.0:

Building for sale. Sign to call for appt.

Attached photo(s):
https://westnordost.de/p/216884.jpg
https://westnordost.de/p/216885.jpg