The TPW test centre Neuss was finally able to confirm, what the owner of the 500 year old pomander watch tried to proof for a couple of years. The accredited labor used a 3D computed tomography and detected a number of “PH” (“Peter Henlein”) signatures, which were discussed by scientists over the last years. The “PH” signatures were found in the factory and housing parts of the watch and were mostly under 0.05 millimeters long.