ALEXANDER 151 MH tenor tuba

[Gaston]

Hello,

I posted in two threads about the ALEXANDER 151 tenor tuba, asking for help, but ultimately the simplest and most logical thing to do is probably to start a new thread.

So:
I would like to see photos of the C-tuned version of this instrument. It's the 151MH model.
It hasn't been manufactured for a long time (perhaps even several decades), but it did exist.

Perhaps one of you owns one, or owned one in the past?
Any photos and technical specifications would be greatly appreciated !

Thank you in advance.