Dial geometry
A clock reads first as a circle with twelve reference points and two hands crossing the middle. Stencil viability comes from one stable center, numerals on an even radius, and hands set at a readable angle, not from copying every tick a watch photo shows.
Check: Fold the reference through the center in two directions. If opposite numerals stop matching at the same radius, or both hands collapse into one angle, fix the geometry before judging line weight or shading.
