Vienna is chock-full of antique (late 19th and early 20th century) metal roller shutters. The most interesting to find were the shutters made by manufacturers who also made shutters for others cities in the Austrian Empire, in particular for Lviv and Rzeszów, which can be seen in my posts about metal shutters in those two cities.
Joh. Schuberth Wien
Joh. Anderle Wien
Es. Rosenthal Erben Wien
A. Woltär Wien
Shutters by this manufacture can also be found in Rzeszow. In Mukachevo there are old wooden shutters made by Woltär and Molnar, Wien. I think there’s a good chance it’s the same Woltär.
I found examples of old prewar/interwar shutters made by the Woltär company, as well as modern examples. The Alfred Woltar company was founded in 1908 and is still going strong.