RE: [Demo notebook] Workbench questions: what to record before asking for service · RWI-14227

Case 38 — Disputed observation: is this dial colour shift real or just lighting? · source wording exercise

Several posts claim the newer batch of a particular blue-dial model looks more purple than the earlier batch. Others say it's purely photography and white balance. Can we settle this with evidence instead of arguing from different photos?

Review focus: source wording. Retain the source wording beside any paraphrase. Use the original answer fragment “Two photos of the same dial under different light can…” as the discussion anchor; no new event or result is supplied.

Exercise RWI-14227/38: address this question within its stated limits.