>>Purdey used Krupp steel from July 1898 till December 1898 for a total of 80 plus examples due to a strike I believe it was. Rigby used a Krupp absorbed concern(Annener Gu�stahlwerk/Annen Steel Company) as a tube steel source. After say the mid 1880s, and for sure by 1890, there probably wasn't a dime's difference between Whitworth, Krupp & Wittner steel tubes. Only way to say for certain would be to lop off a few inches and send them thru the Dr. Hause gun-barrel testing protocol<<

https://doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=366836&page=3

This may have been for which I was searching? I have always wanted to have a thread of the different makers(French(C Modé was it?), German(including Springer), Russian as Matka of course) & their association w/ Whitworth & Kilby. Maybe this will spark an effort.

Serbus,

Raimey
rse