Going thru the graffiti forward on the tubes, I can't determine the tubeset number not the tubeset knitter initials but the tubes were brought to a state of completion by master Witten tube steel mechanic Werner Gottgetreu and below that is Lindner's quality control mark of HAL over crossed sidearms, which was engaged after the new proof rules. A guess was that it was completed circa 1905:

http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=446068&page=1

Cheers,

Raimey
rse