Ah, ha. So it is true:

http://www.guntrader.co.uk/Guns-For-Sale...120719120147001
Purdey #16252 - August 1898 - with Krupp steel tubes

So from 1897 to the early 1900s, Purdey for some reason, maybe cost?, opted to use Krupp steel tubes but in short order changed their mind back to Sir Joseph Whitworth Fluid Compressed Steel. I have read that Purdey considered Krupp as strong or stronger that Whitworth's.

Kind Regards,

Raimey
rse