During this process I went to the homepage, where I normally never will go, as I have set up keyboard shortcuts taking me directly, where I want to go.
The homepage has gotten a new photo:

I am fairly sure that this is the valve block of an Eb sousaphone, but the odd 2nd valve tubing puzzles me.
E. A. Couturier Co Ltd. - La Porte - Indiana excelled in “Conical Boreâ€

