RE: [Demo notebook] Collector’s comparison desk: dimensions, fit and documented differences · RWI-10122

Case 3 — Disputed observation: is this dial colour shift real or just lighting?

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?

Exercise RWI-10122/3: address this question within its stated limits.