Caliber is the movement's model designation, like a part number. Two watches from different brands can share the same caliber family with different finishing or regulation. On a spec sheet it tells you what's inside and roughly what service parts are available. It doesn't tell you how well that particular example was adjusted.
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Case 21 — What a water-resistance claim does and does not establish
Correction note for “What a water-resistance claim does and does not establish”: retain the wording beginning “Ask a qualified watchmaker about a suitable test for that individual…” in the record. If later material changes it, add the date, the changed wording and the source for that change; do not invent a completed correction here. Keep the stated question separate from any broader claim.
Case 38 — First QC request: the minimum useful information · source wording exercise
What should an initial QC request include so replies can address the actual question?
Review focus: source wording. Retain the source wording beside any paraphrase. Use the original answer fragment “Include complete instrument settings where relevant and say…” as the discussion anchor; no new event or result is supplied.
Exercise RWF-27179/38: address this question within its stated limits.
Case 50 — Crystal types: sapphire, mineral and acrylic trade-offs for daily wear · source wording 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: source wording. Retain the source wording beside any paraphrase. Use the original answer fragment “Sapphire is very hard to scratch but can chip or crack…” as the discussion anchor; no new event or result is supplied.
Exercise RWF-25919/50: address this question within its stated limits.
Case 15 — What a water-resistance claim does and does not establish
A listing describes a water-resistance rating but provides no test record for the individual watch. What evidence would address the gap?
Exercise RWF-24807/15: address this question within its stated limits.
State the lighting and white-balance limitations. Compare controlled images where available and avoid calling a colour defect from differently processed photographs.
Method note for “First QC request: the minimum useful information”: use “State the model configuration, the specific concern and…” 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.
Add a dated correction near the original conclusion and link the new evidence. Preserve the reasoning trail instead of silently replacing an uncertain claim with a confident one.
A correction worth making: 'sapphire = premium, mineral = cheap' oversimplifies it. A well-fitted mineral crystal on a modest watch can be perfectly suitable, and replacing a cracked sapphire is usually more expensive. Material is one factor among several, alongside fit, gasket quality and coating.
Case 45 — Movement identification: the limits of a rotor photograph · source wording exercise
Limit of the answer in “Movement identification: the limits of a rotor photograph”: “Ask a qualified watchmaker to inspect it if identification matters for…” 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: source wording. Retain the source wording beside any paraphrase.
Case 12 — Lume comparison: keep exposure and charging conditions consistent
Treat the comparison as inconclusive. Repeat with equal light source, charging duration, elapsed time and camera settings; disclose conditions rather than assigning an unsupported quality score.
Case 17 — Service enquiry: information a watchmaker can use
Summary draft for “Service enquiry: information a watchmaker can use”: the answer addresses “Document when it stops, winding behaviour, recent impacts and…”; the related point is “Be honest about the watch and request an assessment…”. 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.
Correction note for “QC photographs: perspective or a genuinely tilted index?”: retain the wording beginning “Request a level straight-on image with the hands…” in the record. If later material changes it, add the date, the changed wording and the source for that change; do not invent a completed correction here. Keep the stated question separate from any broader claim.
Case 33 — Reading a timegrapher recording without losing the context
Clarification for “Reading a timegrapher recording without losing the context”: the point beginning “Keep the complete recording and ask for the…” 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 5 — QC photography: what photos actually help verify a pre-owned listing?
Ask for a straight-on dial photo with diffuse light and no flash, the full dial in frame, and the hands placed away from the indices (10:10 isn't ideal, because it covers the upper markers). Flash flattens printing and hides lume condition. Diffuse light shows print edges, alignment and any spotting.