This PowerPoint presentation covers the basics in removing an Etachron stud, making your own tools to do so, replacing the Etachron stud to be able to remove the hairspring and balance, as well as removing & replacing Incabloc settings in the mainplate & the balance to be able to replace lyre springs. In slides marked 'Video' in the top left corner, move your cursor to the bottom of the screen and a play sign will appear in the bottom left of the slide 377149799_Lesson15.Incabl