Johanson
The engraving shows the full size of the tool, which consists of a steel plate mounted on feet, and pierced with a number of holes for the reception of screws, when taking down a watch. In the center of the index is a hole for the staff, and an oblong slot for the reception of the roller jewel. To get any American movement in beat proceed as follows: In front of No. 100 is a small spring, push same towards No. 10, then place the balance on top of the stand, with staff in center and roller jewel in the oblong hole, let the spring back gently, the balance will then take its own position. Set degree hand in front of the desired degree, as per directions on index table, place hair spring stud in front of degree hand, and push on the collet. INDEX TABLE FOR HAIR SPRING STUDS.