Timepiece crown stem with a coding pattern

摘要

The present invention concerns a method of making an encoding pattern (3) on a timepiece setting stem (1) for detecting an axial and/or angular movement and/or position of the setting stem (1). The method comprises providing the surface of a shaft (5) of the setting stem (1) with a first section (A) having first material properties and a second section (B) having second material properties to form the encoding pattern (3), where the first and second material properties are at least partially different from each other. The first section (A) comprises a strip (S) extending diagonally on the surface of the shaft (5).