Quick correction, Hof in this case doesn't refer to house but refers to the seat of nobility. Like the British "by appointment to Her Majesty" crests, this indicated the gun make was a supplier to some (pre-WW1) governing house. Since Wiesbaden wasn't a seat of government pre-45, it's hard to say by whose appointment the maker was using the title.
Also, I'm noticing the lack of crown over N proof mark, indicating the weapon might be chambered for an older black-powder round.