The Centering device has to be cliped on to the target ring to position. It in the center 90° to the target.
Champion Brillen AG, Däderizstrasse 21, 2540 Grenchen, Switzerland, info@champion-brillen.ch
champion-Vertrieb Michael Meier, Bebelstr. 16, 44623 Herne, Germany, championbrillen@t-online.de