@arth7yderg7yur,
Im not familiar with that stamp but usually the embossing is a product label of the paper manufacturer and the type pf paper.
Im familiar with D'Arches, Canson, Ingres, and RIVES. (The closest one would be RIVES as they have had thousands of paper types and weights and surfaces and tints. SO , maybe look up RIVES embossing symbols. RIVES has been in business for a billion years (+/- 14)