This is a Mobaco construction toy example, created by a Dutch factory Moubal from 1920's to 1950's. Mobaco consists of wooden pillars and card board plates, which allows for different structures. This model was also used by it's predecesor: Pulko. The Mobaco library is also released (LDraw format), so you could build yourselves. For more information, see [website](https://retrobuildingtoys.nl/category/vintage_toys/vintage-toys-collection/).