RE: [Demo notebook] Collector’s comparison desk: dimensions, fit and documented differences · RWI-28278

Case 103 — Crystal types: sapphire, mineral and acrylic trade-offs for daily wear · comparison exercise

Spec sheets list sapphire, mineral or acrylic crystals, and opinions in threads are very strong. For a daily-wear watch, what are the real trade-offs, and is an anti-reflective coating worth paying for?

Review focus: comparison. Make the basis of a comparison explicit before interpreting it. Use the original answer fragment “Acrylic scratches easily but flexes, rarely shatters, and light scratches…” as the discussion anchor; no new event or result is supplied.

Exercise RWI-28278/103: address this question within its stated limits.