I bought this from Ebay [Netherlands] some weeks ago. It was not working at all. It was old and dusty, provided the challenge to see if could be restored. I opened it changed the curtains and CLAed the sub-systems one by one. They started working; however, the gap between the curtains remained closed, thus not offering any exposure. So, I sent it to Mr Yazdhani in Kamera Werke, Calcutta. He is an enthusiast about cameras from the 1930s. He found that many of the joints were worn out and he managed to get it to work on the slow speeds and the fast ones up to 1/250sec. The 1/500 and 1/1000 second do not expose nay gaps between the curtains. A very interesting camera with simple elegant engineering. One of these days I might try adjusting the closing curtain gear by a noth or two to see if it will expose 1/500 and 1/1000 sec. Though I do not use those speeds, it is curiosity and “itchy fingers” as my late mother used to say. I used a Domiplan lens and took some random pictures at various types of lighting. The film is ORWO UN 54 and the brew is home made, as usual.