IWC Da Vinci

Most IWC Da Vinci references take a 19 mm watch strap: 167 of 272. The lug width follows the case size: 36 mm case → 18 mm, 39 mm case → 19 mm, 42 mm case → 20 mm and 43 mm case → 24 mm.

Shop 18 mm Shop 19 mm

IWC Da Vinci lug width by case size

272 references measured. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
29 mm	15 mm	10	—	IW3736-01, IW3736-02, IW3736-03
36 mm	18 mm · 20 mm on 8 · 12 mm on 1	34	—	IW4523-01, IW4523-02, IW4523-03
37 mm	19 mm	18	—	IW3528-01, IW3528-02, IW3528-03
39 mm	19 mm	149	—	IW3750-01, IW3750-02, IW3750-03
40 mm	18 mm · 17 mm on 2	6	—	IW3566-01, IW3566-05, IW3581-01
42 mm	20 mm · 18 mm on 1	20	—	IW3754-01, IW3754-02, IW3754-03
43 mm	24 mm · 18 mm on 6 · 17 mm on 3 · 20 mm on 1	28	—	IW3764-01, IW3764-02, IW3764-03
44 mm	24 mm · 18 mm on 1	6	—	IW3761-01, IW3761-02, IW3761-06
not recorded	24 mm	1	—	IW376412

References that take a different watch strap

IW4523-11: 20 mm, not the 18 mm of most 36 mm cases
IW4523-14: 20 mm, not the 18 mm of most 36 mm cases
IW4523-20: 20 mm, not the 18 mm of most 36 mm cases
IW4523-21: 20 mm, not the 18 mm of most 36 mm cases
IW4523-23: 20 mm, not the 18 mm of most 36 mm cases
IW4523-31: 20 mm, not the 18 mm of most 36 mm cases
IW4583-07: 20 mm, not the 18 mm of most 36 mm cases
IW4593-04: 20 mm, not the 18 mm of most 36 mm cases
IW4593-06: 12 mm, not the 18 mm of most 36 mm cases
IW3566-02: 17 mm, not the 18 mm of most 40 mm cases
IW3581-03: 17 mm, not the 18 mm of most 40 mm cases
IW3934-02: 18 mm, not the 20 mm of most 42 mm cases
IW3762-01: 17 mm, not the 24 mm of most 43 mm cases
IW3762-03: 18 mm, not the 24 mm of most 43 mm cases
IW3762-04: 18 mm, not the 24 mm of most 43 mm cases
IW3762-05: 17 mm, not the 24 mm of most 43 mm cases
IW3762-06: 18 mm, not the 24 mm of most 43 mm cases
IW3762-07: 20 mm, not the 24 mm of most 43 mm cases
IW3766-02: 18 mm, not the 24 mm of most 43 mm cases
IW3921-01: 17 mm, not the 24 mm of most 43 mm cases
IW3921-03: 18 mm, not the 24 mm of most 43 mm cases
IW3921-04: 18 mm, not the 24 mm of most 43 mm cases
IW3931-01: 18 mm, not the 24 mm of most 44 mm cases

Questions about the IWC Da Vinci

Do all IWC Da Vinci case sizes take the same watch strap?

No. The lug width changes with the case size: the 36 mm case takes 18 mm, the 37 mm case takes 19 mm, the 39 mm case takes 19 mm, the 42 mm case takes 20 mm and the 43 mm case takes 24 mm. Check your case diameter before you buy.

Can two IWC Da Vinci watches with a 36 mm case take different watch straps?

Yes. Of the 34 IWC Da Vinci references with a 36 mm case, 25 take 18 mm, 8 take 20 mm and 1 take 12 mm. The reference number decides, not the case size alone.

Every IWC Da Vinci reference

Other IWC families

Inside each one the lug width often changes: it is the reference that decides.

All IWC families → · Why the size changes inside a family →