Indexing mechanisms GN 200 replace and simplify complicated indexing and safety mechanisms.
Besides the standard scale (Type AS) the control knob version may be supplied with any scale. In such cases, it is recommended to use the matte chrome plated version since the color contrast is better.
Regarding design, numbering run, numbering position and numbering sequence of the scale please see the layout for scale rings on the order sheet „How to Order Graduations“