therefore, Sl(Syndicat Liegeois), could still apply to the "Sl" stamp.
I just wanted to note that equating the "Sl", which typically holds the position of the tube maker and is usually slightly worn or overstamped by proofhouse marks, is still a variable or wildcard and is undefined for now. It could be for Sigmund Loewe, brother of Ludwig & Isidor Loewe, who all founded Ludwig Loewe & Company in 1870 but I would think him to be more in the business end instead of the barrel making section. There's the Illig family who did compete in competitions but I don't know anymore than that. But the "Sl" mark does crop up from time to time and is seen on pattern welded tubes as well as cast/fluid steel.
Kind Regards,
Raimey
rse
