image by René Maly (Image rights)
Like many box cameras from that era this is mostly made of pressed cardboard. Inside the camera is a metal film holder, mounted on a piece of wood to give it a more rigid feeling.
The Fildia has a rotary shutter with one shutterspeed of around 1/30sec and a bulb mode. It features 2 waterhouse stops and a built-in yellow filter that slides in front of the lens by pulling a small metal lever.