I was excited to receive my item. It arrived in an envelope and the case was cracked inside. Not a big deal so I pull it out and figure that the rubber goes on the stationary end and pressure is applied to close the back. Well it snapped it on with little trouble. Then I get the bright idea to "make sure" it is on good. Got  face full of glass as the watch shattered. I just purchased a replacement watch with an auto wind mechanism no more batteries to replace. Hopefully this thing will stay in the bottom of my tool box and never come out again. It really is my own fault if I had just stopped after it snapped into place the first time I would be happily wearing my favorite watch instead of spending 100 bucks to buy a new comparable watch and waiting for it to arrive. I have no regrets being a do it yourself type I am willing to accept the price of failure. Didn't know my own strength. :( Hope you all have better luck.