A yellow-looking, freshly appearing ink window without recognisable stripes is striking: if the fountain pen had been little used, the stripes would have to be present; if it had been heavily used, the window would have to be darkly discoloured by ink residues. Both speak against an unchanged original body. Also the nib looks compared to the rest of the older components like the D.R.P. number possibly younger. Overall the piece thus appears dubious and suggests that at least the body or parts of it were subsequently made or brought together.