Après quelques recherches sur le net, voici ce que j'ai pu trouver :
Finest Sheffield Steel, Forged and Real Hollow Ground In Germany.
The Paroso company was founded by Paul Rosenkaimer in Solingen, in 1895.
On May 24th 1937, Paul Rosenkaimer bought the Carl Linder company, that is still in business
Note: PAROSO - PAul ROsenkaimer SOlingen.