Hump T Dump:
Have you seen anything akin in Russia?

I believe the info Jani located gave the 1907/1908 period when Johann Sigott began his wonder boring. With it being a Johann Sigott tube and adverts that Sigott had an expensive wonder method for addressing your tubes to make them pattern better, the example just about has to be Sigott's design. He advertises to modify your tubes so it must be a slight alteration to the tube thickness.

Kind Regards,

Raimey
rse