As an architect I consider the art and science of a design be it a building or a fountain pen. I have a considerable number of pens I may never use. I'm a collector of these miniature works of art. If their function is a novelty so much the better. The Speedometer pen is unique. As is your L.E. of the Nettuno 1911.
I explore many supplier's websites and have not seen either pen elsewhere. I also appreciate the introduction to your team. The personal thank you note even identified the ink used. Nice touch. I too have a question. Where does the name Truphae come from? Happy new Year. Bob.