This watch by invicta has a Japanese mechanical works. I was delighted to have a reverse crystal that shows the works. I always wanted the in a watch but wasn't ready to buy the swiss version. To my surprise the watch was actually running when I opened the package. The watch appears to have a decent power reserve as it has not stopped running since receiving the watch about one week. I have not worn it everyday but have wound it 15 or 20 times every morning if I wasn't going to wear it so that it would not stop. I am very surprised with the accuracy of the watch. It gains one or two seconds a day. Which puts it in chronometer area. Some swis watches don't even perform that we'll.

The bad is beautiful but has one big downside. I cannot und do the clasp without using a table knife to put in under and in snap either parts of the clasp. The fist day I had it I broke two fingernails trying to get the thing open! Well, at least it runs great, looks good and won't fall off my wrist if I do something to active.