Here’s the practical way to change the strap length on a Franck Muller Conquistador : on many models, the strap is secured with small screws or a model-specific fitting rather than a standard spring bar, so the safest approach is to use the correct screwdriver and remove the strap from the lugs carefully, then install a replacement strap in the same size and length format.

What to check first

  • Confirm the exact model number from the case back, because Conquistador straps are not all the same size.
  • Measure your wrist and choose the strap length that fits your size range; one custom strap guide lists length options such as 75/115 mm for a 16–18 cm wrist as a common reference point.
  • Verify the lug width before buying a replacement, since the wrong width will not fit properly.

How the change is usually done

  1. Lay the watch on a soft cloth.
  2. Use the correct small screwdriver if your model uses screws, or a strap tool if it uses a pin-style fitting.
  1. Remove the strap carefully from both sides.
  2. Fit the new strap, making sure the screw heads or fittings are fully seated.
  3. Check that the strap is secure before wearing it.

Important cautions

  • Do not force the hardware, because luxury case lugs and strap ends can be damaged easily.
  • If the strap is stiff, unusual, or custom-shaped for the Conquistador case, a watchmaker is the safer option.
  • If you only need a better fit, some sellers offer made-to-measure lengths for Conquistador straps rather than a full replacement.

Best next step

If you want the most reliable result, match your exact Conquistador reference, lug width, and wrist size before ordering a strap, then have a watchmaker install it if the screw system looks delicate.

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Item Why it matters
Model reference Conquistador strap shapes vary by reference
Lug width Determines whether the strap physically fits
Strap length Determines comfort and wrist fit
Attachment type Some versions use screws, so removal method differs
TL;DR: identify the exact Conquistador reference, measure the lug width and wrist size, then replace the strap using the correct screw or fitting method rather than forcing it.