Hi Zozo,
Thank you for posting these nice pictures.
What strikes me is that this is the first time I see "Alberto" in front of the name "Hoppe".
As far as I know the grinder's name responsible for many beautiful straight razors was Gustav Hoppe when he was still working in Solingen for J.A. Henckels Zwillingswerk.
After emigrating to South America (I believe Argentinia and am not totally sure, perhaps others can shine some light on that) he started using the name Guillermo.
The Guillermo Hoppe knives mostly still had J.A. Henckels Zwillingswerk stamped into the shank, although exceptions may exist.
Later he produced under the brand "La Rana" (the frog or so).
Very interesting to see another part of the # 14 puzzle, thank you for posting.
Kindest regards, Jazor.