Makers mark: “GHH”
It is speculated that this is the concern of the company Gutehoffnungshütte from Oberhausen. This company was previously known as Machinenfabrik Nuel & Lueg from Düsseldorf-Grafenberg. It is not certain that this company produced eagles. It is also possible, given the poor casting of the makers mark, that it is actually a GPH mark.