watch. The hand on the left sub-dial has fallen off. A common myth states that a genuine watch can be discerned from a fake by the fluid movement of the sweep hand. This is because many counterfeited watches use inexpensive crystal quartz movements which produces the start/stop once per second sweep. Observed closely, one will see that even a true Rolex movement is not a perfectly smooth sweep, but is actually eight movements per second (or 28,800 per hour) in some models or around 21,000
vph in other models. The only mechanical watches that have a second hand that moves across the dial in a truly uninterrupted sweep are the
Seiko Spring Drive series. Nonetheless, some of the counterfeits have automatic movements (genuine or imitation), and Rolex has produced a few models with
quartz movements such as the
OysterQuartz which produces the distinct quartz movement "ticks".
Hallmarks According to the Swiss Customs Service, counterfeit watches can be made in such a manner as to require special equipment to confirm near authenticity. Previously, replica watches could be distinguished by "sloppy printing, soft metal and cheap quartz movements that made the second hand clunk its way round the dial" while recent "fakes feel substantial, keep decent time and have the patina of high quality. Some are so convincing that the only way to tell they're fake is to take the back off". ====== High quality replicas are sometimes modified by collectors and amateur horologists with genuine parts, such as movements, dials, hands, and bracelets, and are known as "". It is possible for a to be made entirely from genuine parts. eBay and other Internet websites have provided the means to buy or sell these parts, which were originally supposed to be after-market spare parts for repair. Some have retrofitted a rare limited-edition dial on a lesser/common version of the same line of watches, and often an original stainless steel watch is disassembled so its dial and movement is placed in an after-market solid gold case. These are difficult to trace, since the watch manufacturer's serial numbers are engraved only in watch case.
Counterfeit digital watches Many low-priced digital watches have also been counterfeited in a similar fashion to luxury watches. It is primarily distinguished by its lower build quality than the original and are significantly less accurate. Examples of commonly counterfeited digital watches are popular
Casio watch models such as
F-91W and various
G-Shock models. ==Homage watch==