All - There are lot of Edifice watches sold in ebay. 99 percent of these are fake. 550 is a famous model sold. In this model, the retro (pendulum type movement) has to work. But it will not work on most watches. There are watches sold calling it non-retro models in 550. There is no such watch made by CASIO so far. This is confirmed by Casio authorized service. So please beware of this. This is not only for 550, it is for most other models of edice. I am saying 550 only because I was cheated in that model. I spent another 400 rs to take it to service centre to check. Useless people. God save buyers.