QC is a sequence, not a glamour photo
A single attractive front photograph cannot verify movement, case profile, clasp, crown or functions. Good QC is a fixed sequence that makes omissions visible. Use the same sequence for every watch so that marketing excitement does not change the standard.
Step 1 — identity
- Correct brand/model/reference family.
- Correct case size, dial colour, bezel and bracelet/strap.
- Serial or internal seller identifier recorded so the same watch can be matched at delivery.
Step 2 — front and side geometry
- Straight-on image for dial centring, marker alignment and date aperture.
- Left and right side images for crown/pushers and case thickness.
- Lug shape and bracelet end-link fit checked.
- Crystal and bezel alignment checked.
Step 3 — movement evidence
- Movement photo when ETA or another premium calibre is claimed.
- Timegrapher after full winding for rate, amplitude and beat error.
- Date/day/GMT/chronograph functions demonstrated as applicable.
- Rotor noise or winding feel noted if abnormal.
Step 4 — chronograph-specific checks
Start, stop, restart and reset. Verify that the correct registers move, the minute counter advances and every chronograph hand returns close to zero. A seller who only shows the central seconds moving has not demonstrated the whole chronograph.
Step 5 — water claim
If water resistance is promised and matters to your use, request a pressure test for the individual watch. Do not infer water resistance from a screw-down crown, a dive-watch appearance or the specification of the genuine watch.
Step 6 — archive the approval
Save the final photographs, video, measurements and tests. When the watch arrives, compare serial/identifier, dial details and visible marks with the approved QC set before removing protective film or using the watch.
Use two-digit dates during calendar QC
Single-digit dates can hide centring problems. Ask for dates such as 22 or 28 where both digits have to fit the aperture. Check horizontal centring, vertical depth and whether a magnifier is centred over the actual numeral rather than merely over the window.
For day-date watches, test several weekday lengths because a short word may look centred while a longer one reveals an incorrect day wheel or aperture.
Timegrapher numbers need a consistent setup
Ask whether the movement was fully wound and which position was measured. Compare results only when the setup is similar. An isolated “0 s/day” image can be achieved through regulation and does not prove long-term stability. Look for a healthy combination of rate, amplitude and low beat error rather than chasing one perfect number.
Inspect the parts that marketing photographs avoid
Request the clasp interior, bracelet end links, underside of lugs, caseback edge and crown/pusher side. These areas reveal machining, coating and assembly more honestly than the polished front. On leather-strap watches, check stitching, keeper loops and buckle finishing.
Delivery QC closes the loop
After arrival, verify that the watch matches the approved unit. Repeat winding, setting and complication tests. If water use is planned, consider a local pressure test even when the seller supplied one, because transport and later case opening can affect sealing. Only after these checks should the watch be treated as fully accepted.
Define reject conditions before viewing the watch
QC is more consistent when the buyer decides in advance which defects are unacceptable. Examples might include a visibly crooked dial, a chronograph hand that will not reset, a movement that does not match the paid-for calibre, a damaged clasp or a failed pressure test when water resistance was part of the agreement. Minor dust, tiny alignment differences or timing that can be regulated may be negotiable.
Pre-defining reject conditions prevents emotional attachment to a particular serial number from lowering the standard after the photos arrive.
Ask for retests when the result is ambiguous
If the chronograph reset is shown from an angle, ask for a straight-on second video. If a timegrapher photo omits amplitude or beat error, ask for the complete screen. If a pressure-test result does not identify the watch, ask the seller to photograph the test with the watch identifier visible. Better evidence is usually easier than arguing about a blurry image.
Keep QC proportional to the price and complexity
A simple three-hand automatic does not require the same functional testing as a 7750 chronograph. A low-cost watch may not justify elaborate movement inspection; a large premium for genuine ETA does. The checklist should expand with the claims you are paying for. The higher the movement premium and complication count, the more evidence is reasonable to request.