I just discovered some other Shimano AX items
 

I knew that Shimano had Adamas AX, 600 AX and Dura Ace AX. I did not know that they also had some derailleurs labeled Altus AX. The rear Altus AX derailleur looks similar to the Adamas AX but the front Altus AX looks just like the normal Shimano FE derailleur.

Has anyone else here ever heard of Altus AX?

Cheers