A (bird)Chair  

It is hard to read from my phone but what is the language of the ink stamp marking? That might be a clue of its origin. It is not the Castelli stacking/linking chairs by Giancarlo Piretti from 1967 and it is also not the chairs by Don Albinson designed in 1965. Those two are the most recognizable in this category/type of seating. Your chair looks well made and it looks like it wants to fold flat like the Plia chairs also by Piretti for Castelli from 1969.

i've flipped the photo horizontally an vertically and the "label" is definitely italian,
date seems to be 12-02-81.