Peugeot/French specific -

It's high-tensile steel, dude. And it's not a PX-10.


That "INOXYDABLE" label, in combination with the REYNOLDS 531 tubing sticker and the fancy Nervex lugs screams quality, therefore is indicative of Peugeot PX-10. (Apologies to Randy for borrowing his photo)


Derailleurs:



See that black plastic? That's called Delrin. It has low coefficient of friction, but no other advantages (such as shear strength, compressive strength, and tensile strength relative to steel or aluminum). Delrin is many things, but it is not good for loaded / tensioned bicycle parts exposed to the elements. What it means is 1) your derailleurs could launch themselves into your drivetrain and 2) you will likely need new derailleurs before long.

Better options are these: