I often familiar in the past on the reviews of other buyers and have been so always good advice. When I read the review of this clock that the closure was a quality defect, I was amazed. I own several watches CK and was convinced of the quality. That's why I took the risk and ordered the clock despite the negative review. I was not disappointed. The clock is not only beautiful, and the shutter keeps properly. This type closure I have other watches (other brands) and have never had problems with it. I can recommend the clock with a clear conscience.