Here's a Sigott from 1933 with tubes sourced from SI in Liège.


[Linked Image from i.imgur.com]

Johann Sigott novel cuts in scattergun tube:

https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=299257&page=1

I will have to re-read the Austrian & German Proof Rules for 1910 and see what type reciprocity there might have been.


Hochachtungsvoll,

Raimey
rse