The core trade-off is scratch resistance versus shatter resistance. Sapphire is very hard to scratch but can chip or crack from a sharp impact on an edge. Acrylic scratches easily but flexes, rarely shatters, and light scratches can be polished out at home. Mineral glass sits in between and is often the cheapest to replace.
Forum Replies Created
Case 24 — Comparing dial colour under different lighting
One image was taken beside a window and the other under a warm lamp. How should a colour comparison be qualified?
Exercise RWF-29162/24: address this question within its stated limits.
Case 15 — Seller review template: facts, dates and unresolved questions
Clarification for “Seller review template: facts, dates and unresolved questions”: the point beginning “Use fields for order date, promised terms, dated…” belongs to the question as written. It should not be read as a report that a new check, purchase or experiment has been completed. Review focus: scope. Keep the stated question separate from any broader claim.
Keep the complete recording and ask for the settings, winding state and position. A single number cannot establish service condition, movement identity or performance on a wrist.
Clarification for “Forum comparison archive: link the evidence and the correction”: the point beginning “Add a dated correction near the original conclusion…” belongs to the question as written. It should not be read as a report that a new check, purchase or experiment has been completed. Review focus: scope. Keep the stated question separate from any broader claim.
Case 28 — Reading a timegrapher recording without losing the context
Summary draft for “Reading a timegrapher recording without losing the context”: the answer addresses “Keep the complete recording and ask for the…”; the related point is “A single number cannot establish service condition, movement identity…”. Keep both connected to the opening question, and mark any conclusion needing further records as unresolved. Review focus: scope. Keep the stated question separate from any broader claim.
Case 42 — Comparison thread: 38mm vs 40mm versions of the same field watch, with a dated correction log · source wording exercise
Method note for “Comparison thread: 38mm vs 40mm versions of the same field watch, with a dated correction log”: use “Diameter alone tells you little…” as a row heading in a proposed working record. Put the statement, its supporting source or measurement, and any unresolved detail in separate fields. This proposes a format; it supplies no additional evidence. Retain the source wording beside any paraphrase.
Case 21 — Case finishing: distinguish a reflection from a surface mark
A bright line appears in one polished-case image. What additional evidence would distinguish a mark from reflected light?
Exercise RWF-22111/21: address this question within its stated limits.
Case 2 — Bracelet fit: measuring the usable clasp adjustment
Clarification for “Bracelet fit: measuring the usable clasp adjustment”: the point beginning “Record wrist circumference, removable links and the clasp…” belongs to the question as written. It should not be read as a report that a new check, purchase or experiment has been completed. Review focus: scope. Keep the stated question separate from any broader claim.
Case 22 — Date window centring: compare the same date at the same angle
Limit of the answer in “Date window centring: compare the same date at the same angle”: “Use the same numeral, camera axis…” is an excerpt from the discussion, not an independent verification. A reader needs the relevant original material before treating an interpretation as established. Review focus: scope. Keep the stated question separate from any broader claim.
Method note for “Seller review template: facts, dates and unresolved questions”: use “Use fields for order date, promised terms, dated…” as a row heading in a proposed working record. Put the statement, its supporting source or measurement, and any unresolved detail in separate fields. This proposes a format; it supplies no additional evidence. Keep the stated question separate from any broader claim.
Case 32 — Model comparison: dive bezel action and alignment, how to compare fairly
Back-play is the most objective feel measurement. Set the bezel on a click and gently push it the other way without forcing it. Noticeable wobble before it engages means play. A little is common and within normal production, but if one model has visible movement and the other doesn't, that's a real difference you can describe.
Clarification for “Beginner glossary Q&A: complication, caliber, jewel count, power reserve”: the point beginning “Two watches from different brands can share the same caliber…” belongs to the question as written. It should not be read as a report that a new check, purchase or experiment has been completed. Review focus: scope. Keep the stated question separate from any broader claim.
Describe visible bridge shapes and markings separately from the proposed identification. Ask a qualified watchmaker to inspect it if identification matters for servicing; do not open the case merely for a forum answer.
On alignment, a clarifying point: is the misalignment visible straight on, or only from an angle? Parallax on a raised bezel can make a perfectly aligned pip look half a click off when viewed slightly from the side. Photograph straight above the dial before calling it misaligned.