Twin lens reflex cameras were developed in Germany in the late 1920s. One lens is for focusing only, the other one is for taking the picture. This system enabled you to keep a view of the subject while taking the picture, and it was easier mechanically because there was no system needed to keep unintended light away from the film chamber. There were many of these cameras built until the 70s, all replicating the original idea by German manufacturer Rollei.
This particular camera was built in Japan intended for the Dutch market. It’s from the 1950s and it still works great!