Ops, I have forgotten "[English]"...
I can't found the photo but they say:
ZitatThe 173P is offered in a stylish silver color and features a unique dual-hinge design that can be folded flush and used as the wall mount bracket.
So I think the design is the same of the X series.
This can maybe confirmed by the 153P photo on this page:
...and I hope better solidity than old squeaking models.