RE: [Demo notebook] Reference notebook: corrections and recurring beginner questions · RWI-20056

Case 40 — Strap dimensions: lug width, taper, thickness and spring bar diameter explained · source wording exercise

Summary draft for “Strap dimensions: lug width, taper, thickness and spring bar diameter explained”: the answer addresses “Measure with a ruler marked in millimetres, ideally…”; the related point is “Most watches use even numbers (18, 20, 22mm),…”. Keep both connected to the opening question, and mark any conclusion needing further records as unresolved. Review focus: source wording. Retain the source wording beside any paraphrase.