This is a unique find for me. There are about 8 of these antique locks still attached to a building in Rzeszów, Poland. They were made by a company L. Russ in Drohobycz. The city of Drohobycz is presently in Ukraine, but both Drohobycz and Rzeszów were historically part of Galicia as well as part of interwar Poland.
The label also says “żaluzje kratowe” which means “grid shutters.”