That's separation. It's extensive enough to affect the picture quality, especially at wider apertures, (testing will only be valid if you have a perfect sample to compare it to-especially if you are unfamiliar with MF results). The camera is probably not worth buying because there's lots of good Rolleiflexes around (they made millions). Try to buy the best example you can afford, even if it needs a CLA.
Here's my Planar 3.5 with separation: http://www.rangefinderforum.com/foru...9&d=1165365488
It works well, but the value of the camera is dramatically lower than it could be (except to me).