[Hong Kong] Seller’s Reliability Checklist for Watches

1. Full set & paperwork check

• Verify box, booklets, swing tags, warranty card, links and accessories are correct for that reference and production year.

2. Serial & reference verification

• Check that the serial and reference numbers on:

  • Case (between lugs or rehaut, depending on generation)

  • Bracelet / clasp codes

  • Warranty card

• All match and are correct for that model / production period.

3. Physical & microscopic inspection

• Weight, case finishing, edges, crown and tube, engravings, dial printing, hands, lume plots.

• Loupe / microscope inspection of dial, hands, bezel, rehaut engraving, movement finishing to spot aftermarket or counterfeit parts.

4. Movement, timing & water-resistance tests

• Open the caseback (where appropriate) to inspect the movement and rotor.

• Run on timing machine; pressure test for water resistance; crystal (sapphire) check.