Ah, Francis gets on a tear/jag every now & again and it may be Schnaps? Anyway, I'm inclined to think that the R in the Rchling Spezial Stahl R7L just might be fore Rodenhauser. Hermann Rchling & Wilhem Rodenhauser teamed up in 1905 I believe it was & it may be their 1st alloy developed between 1907-1916? Their furnace, Rchling-Rodenhauser-Induktions-Ofens, was online by 1908. Roechling had a large influence at Mousson in the French province of Lorraine by establishing a monopoly. Apparently in 1914 in constructing their own steel mill the Carlshtte they were utilizing components, tools & machinery from the French-Lorraine area and after WWI that was frowned upon by the powers that be and in 1918 one of the Rchling fellas(probably Hermann & maybe a brother Robert) was convicted of disassembly of a French multiple smelter and the demerit was 10 years, fine of 10 million Francs and a banishment of 15 years from Saarland. Looks as if Robert spent some time there as Hermann was elusive and escaped to Heidelberg.
Kind Regards,
Raimey Ja, meine Fruend, Sie bist korrekt- Ich leibe schnapps- Rumplemintz-- uber alles!!
rse