Strap for Constellation Quartz 27 Brushed Yellow Gold / MOP Omega

The lug width of the Constellation 123.55.27.60.55.016 is exactly 20mm. This measurement is crucial for strap compatibility: all 20mm straps will mount correctly on the case lugs without forcing. It is important not to confuse this measurement with the case width: the 20mm is measured perpendicular to the dial, from outer lug to outer lug.

For the 123.55.27.60.55.016 in yellow gold, alligator in dark brown or cognac tones represents the ideal choice: the regular grain of the leather reflects the luster of gold creating chromatic synergy. Alternatively, smooth calf in dark brown or bordeaux offers formal versatility. For seasonal rotation, a summer silk NATO or technical rubber keeps the Constellation suited to different contexts. I advise against black straps, which create chromatic discord with yellow gold.

Changing the strap on a Constellation 123.55.27.60.55.016 requires access to the case lugs using a specialized spring bar tool or strap changer. Position the watch with the dial facing down and locate the two lugs on one side. Gently push upward on the spring bar pin using the appropriate tool until you free the end of the previous bracelet or strap. Repeat on the second lug, then align the new strap to the lug holes and secure the pins from both sides. If you are unfamiliar with the procedure, entrust the work to a qualified watchmaker.

All artisanal 20mm straps are compatible with the Constellation 123.55.27.60.55.016. On milanostraps.it you will find a complete collection of 20mm straps made in alligator, shell cordovan, calf and other fine materials. Each strap can be customized in length, color, initials and stitching type. Compatibility is guaranteed by ISO standardization: 20mm means exactly 20mm.

The lifespan of a leather strap varies depending on material and use. A quality alligator or calf develops authentic patina and resists 3–5 years with daily wear, gaining increasing charm. Shell cordovan, more resistant, can last 5–7 years. Longevity depends on perspiration, UV exposure and maintenance: occasional cleaning and storage in dry environments significantly extend useful life. Casati Milano straps benefit from an 18-month warranty and can be regenerated through professional restoration.