Looking through my files I found a note from Daryl and Raimey regarding this "Charles Daly Diamond Quality Krupp Drawn Steel Barrels" marked double
https://www.morphyauctions.com/jame...nder-lever-double-barrel-shotguns-59094/

Here is a Prima Flussstahl Krupp-Essen
https://www.gunsinternational.com/g...luss-stahl-16-gauge.cfm?gun_id=101473875

THIS is a bit weird - "Demons of Krupp" by Heinrich Kley; part of paintings commissioned by the Krupp family in 1911
https://www.lwl.org/pressemitteilungen/mitteilung.php?urlIDAlt=1085472720_0

[Linked Image from photos.smugmug.com]

[Linked Image from photos.smugmug.com]

Another by Kley; "Tiegelstahlguss bei Krupp". Note the workers are wearing wooden klompen

[Linked Image from photos.smugmug.com]