ScubaDudeStore service is top-notch. I appreciate the FAST shipping too! I was intrigued to own and adding a made in Russia wrist-watch. The amphibian I purchased is beautiful and some call it the AK-47 of watches! To the average watch enthusiast, the crown and stem appear to be poorly manufactured when setting the time. That’s because the entire assembly seems to hanging out of place. This is engineered to do just that as it reminds the owner he needs to screw it back in. With this type of system, it is almost impossible to take this watch into the lake, ocean or swimming pool with a crown that is not screwed in all the way. The double case back is also pure Russian genius. The case back ring must be removed first. It acts as a washer that distributes the pressure evenly across the snap back case back. Everything about how this watch seems weird or even cheap at first but then after further analyzing you realize how clever the design actually is.