Hallo and congratulation for this forum and interesting Watch Repair Talk's clips. Could anyone show or tell how to regulate a Valjoux 7550? I noticed that there are two versions: one simplier with two arms (one with two dots) and another one more complicated (unfortunately mine) in which there is a ring with an arrow which points to + - like in the picture below. In this case, should one move the edge of the arrow or is anything to be unlocked before doing that, or where does one have to touch/push in order to move the arrow towards + or - ? Many thanks