Strap for Da Vinci Perpetual Red Gold / White / English

The lug width of the IWC Da Vinci IW3750-27 is 19 millimetres. This dimension represents the space between the inner edges of the lugs—the attachment points for the strap. Measurement is taken with a calliper positioned between the inner borders of the two lugs, excluding the lugs themselves. A 19-millimetre lug width restricts compatibility to straps specifically cut for this dimension, though it permits highly sophisticated personalisation without requiring adapters.

For a chronograph in rose gold such as the Da Vinci IW3750-27, alligator in dark brown or black creates an elegant contrast. Vegetable-tanned calf leather, preferably in tobacco or cognac tones, develops a natural patina that mirrors the ageing of rose gold. For formal contexts, black alligator with a rose gold deployante buckle is timeless. Scotchgrain calf adds tactile dimension, whilst charcoal grey textile offers neutrality for professional settings.

To change the strap, position the watch face-down on a soft surface. Locate the spring bars—the securing pins in the lugs. Using a dedicated strap removal tool, press the bar gently downwards to disengage the spring. Extract the old strap, aligning the new strap to the 19-millimetre lug width. Repeat on both lugs. A specialised atelier such as Casati Milano can perform this operation with precision, eliminating any risk to the rose gold case.

Yes, aftermarket straps are compatible provided they are manufactured for a 19-millimetre lug width. The handcrafted straps from milanostraps.it are compatible with the IW3750-27 and offer full personalisation: leather selection, initials, stitching thread and custom sizing. A rose gold deployante buckle maintains chromatic coherence with the case. Ensure strap thickness is appropriate (typically 3.5–4 millimetres) and that the buckle does not compete with case proportions.

A quality handcrafted leather strap mounted on a chronograph such as the Da Vinci IW3750-27 has a lifespan ranging between 5 and 10 years depending on use, climate and maintenance. Vegetable-tanned alligator tends to outlast fine calf due to leather density. Constant exposure to humidity, perspiration and UV radiation shortens useful life. Stitching, if executed with quality synthetic thread and regular stitches, maintains structural integrity even after years. Casati Milano provides an 18-month manufacturing guarantee and offers structural repairs on personalised straps.