Vacheron Constantin FiftySix

Most Vacheron Constantin FiftySix references take a 20 mm watch strap: 9 of 13.

Vacheron Constantin FiftySix lug width by case size

13 references measured; 1 more have an integrated bracelet. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
40 mm	20 mm · 18 mm on 4	12	—	4000E/000R-B065, 4400E/000A-B437, 4400E/000R-B436
41 mm	20 mm	1	—	6000E/000R-B488

References that take a different watch strap

4000E/000A-B439: 18 mm, not the 20 mm of most 40 mm cases
4000E/000A-B548: 18 mm, not the 20 mm of most 40 mm cases
4000E/000R-B438: 18 mm, not the 20 mm of most 40 mm cases
4400E/000A-B943: 18 mm, not the 20 mm of most 40 mm cases

Questions about the Vacheron Constantin FiftySix

Can two Vacheron Constantin FiftySix watches with a 40 mm case take different watch straps?

Yes. Of the 12 Vacheron Constantin FiftySix references with a 40 mm case, 8 take 20 mm and 4 take 18 mm. The reference number decides, not the case size alone.

Every Vacheron Constantin FiftySix reference

Other Vacheron Constantin families

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

All Vacheron Constantin families → · Why the size changes inside a family →