QC should examine the day, date, month, moonphase and 24-hour indications for alignment, then review the dial embossing under direct light. The alternating bezel surfaces, crown fit, case edges, deployant action and strap attachment deserve the same close inspection. The pre-dispatch proof should show the actual dial, case profile, strap and clasp so the configuration can be reviewed as a whole.
The blue strap also makes the watch easier to read as a complete outfit choice: it can sit beside denim, knitwear or a navy jacket without the case and dial becoming visually disconnected. That is the practical distinction from a neutral strap, and it is why this exact color pairing deserves its own selection rather than being treated as a minor variation. It also gives the calendar watch a clearer weekend identity when the bracelet version would feel too polished.
For a buyer comparing 5726 variants, the decision is less about adding another complication and more about deciding where the color should live. Here, the blue runs through the dial and strap, so the polished and brushed case becomes a controlled break between two matching surfaces. That makes the watch read deliberately sporty without relying on a bright accent. The strap should sit flat at both lugs, and the deployant should close with an even, centered action. Those practical checks protect the visual coherence that makes this version worth selecting.