For now I have searched high and low and have not found what I was searching for on the Witten crucible steel with the quality mark Excelsior, Tiegelstahl - Qualittsmarke Excelsior(Wittener Exzelsiorstahl). Seems Excelsiorlufe were touted as having been tested for military and sporting applications and were found superior to other crucible steel of the time. Its origins may have been much earlier but its merits were acknowledged circa 1902. Still not sure when or if the trademark was filed and am still searching for the sporting weapon with the earliest set of Witten Excelsior tubes. I'm guessing post 1893?

But most fitting for H.A. Lindner to choose such a quality steel for his sporting weapons to wear.

Kind Regards,

Raimey
rse