I have owned two Moskva 5 6X9 folders and an older Moskva 4 6X9 folder. Both of the Moskva 5 holders were in almost mint condition, but the struts were very sloppy and the rangfiner was off so I never felt comfortable using either of them.The Moskva 4, on the other hand, looked like it had been through two wars, but it was very rigid and the rangefinder was spot on. I sold the two Moskva 5s and kept the 4, which I still use from time to time.
Originally Posted by P C Headland
The Moskva 4 also has the Industar lens of the 5. If you use the camera on a tripod and focus accurately this lens is a very good performer.