Drilled folding-sliding metal panels in Paris by H&dM 
This is another case of drilled folding-sliding metal panels. It is very similar to , also by H&dM, but here the perforations are rectangular shaped, and smaller. However, the percentage of perforation is probably higher, around 50%.
More info in:ArquiBlog 1rst part - 2nd part More photos of the building, by Margherita Spiluttini[see also case about wooden roller shutters on curve guides on the same building]