Hermann, a very interesting Navy dagger. I remember the 2nd model Luft dagger that Gary speaks of. It was sold by Johnson to an advanced collector who is a forum member here. There were a variety of questions about it and ultimately it was returned to Johnson.
Navy daggers are not something I specialize in but I agree that the sailing ship motif doesn’t jump out to me as a likely candidate for an unmarked blade but as we all know, anything is possible in this hobby. What I’m wondering is if we can identify the parts as coming from a specific manufacturer.
The thing that jumps out to me is the logo not being centered, so much so that part of the top arc is missing. I’m assuming the logo is etched?
