Vintage Hamilton ETA Valjoux 7750, Automatic Chronograph Movement 25 jewels. This movement is working as it should with all it functions. But anyway keep in mind that its not a new one and also it's recommended to be operated and installed by a professional watchmaker. You will get the exact movement in the pictures so please check for the esthetic condition! Feel free to ask for further information, im here to help :, also for custom related help.