Restoration of a Vintage Omega Seamaster Cosmic Watch - Caliber 752

This time i´am restoring an Omega Seamaster Cosmic. It´s powered by the famous Omega 752 automatic movement. A nice and robust in-house-movement, red-golden colored and equipped with a swan-neck fine adjustment. It beats at 19800bph and the lift angle of the balance is at 49°. The referencenumber of this Omega is and after some investigations, i believe it´s from 1967. The movement works... at least for some seconds after shaking or winding it up by hand. The crystal has many scratches and the case has some bumps and marks. The crown is not original and the old strap is not only ugly but also in a bad condition. This watch has a monocoque-case, so i need to take out the movement to the front after removing the crystal. I don´t have the original Omega “Tool 107“, but a common crystal-remover gets the job done by ease as well. Even with the dial and hands removed, the movement stops after a few seconds. I need to