Well I own a Fossil: Posseidon watch...this one but I wanna be sure what is it because I dont know about movements etcThere are many Miyota movements, with differing features and levels of quality. Do you have a certain model in mind?
I know my watch is automatic but what kind of movement does it use? in the shop they said it had a japanese machine but I dont know the movement:-(It's a mechanical movement, i.e. no electronics. It's an automatic, so you don't have to manually wind it. It winds itself when you move around.
The movements inside of watches can be broken into two broad types. One type is quartz....like we find in G-Shocks. The movement (called a module in the G Shock) consists of electronics powered by a battery. The electronics cause small currents to change the digital figures on your Liquid Crystal Screen. Note: the electronics can be used to power small step motors that connect to hands in a analog display (one with hands). The power for these electronic watches comes from a battery or solar panel.
The second broad type of movement is a mechanical movement. They consist of a series of springs, gears, levers and so forth. The movement is powered by a mainspring, which must be wound.....either by hand, or by a little rotating weight inside the watch which tightens the spring as it spins around as you move your wrist. This type of automatic winding watch is called...an automatic! These mechanical watches will have analog displays.
Your watch is a automatic watch with a mechanical movement. Miyota movements (made by Citizen watch company) are some of the better mass produced movements, along with Seiko. I have several watches with Miyota movements, and find them tough, durable, and accurate....they compare well with the Seiko 7S26 and 7S36 movements.
Suggestion: Google on Miyota movement (your movement number here) and read about it on the web. You can do the same for Seiko movement 7S26 and so forth. The web is a wonderful thing for learning about things like this. Enjoy.