It could be a Wolo but they are all the same horn with different badges. Somewhere on the net someone took the different ones apart and the parts were interchangeable. So my guess is they all come out of the same factory and have a different brand stamped on them. Regardless the horn they are using is the same design as the Stebel. My horn is a Wolo....looks exactly like the Stebel. If someone has empirical evidence to the contrary please post it.