Question 1

What is the lug width of the Omega Constellation 123.25.27.60.55.009?

Accepted Answer

The lug width of this model is 19mm. This specific dimension derives from the proportion between the 27mm case diameter and the case height. Measuring it correctly means positioning a digital caliper between the spring bar holes from inner edge to inner edge, without including the total width of the case.

Question 2

What is the best strap for the Omega Constellation 123.25.27.60.55.009?

Accepted Answer

Alligator with vegetable tanning is the most refined solution, as it emphasizes the watch's intrinsic elegance without competing visually with the griffes bezel and mother-of-pearl dial. A dark matte brown complements the warmth of the 18-karat rose gold. Alternatively, Hermès calf or Japanese shell cordovan ensure durability and authentic patina development over time.

Question 3

How do you change the strap on this Constellation?

Accepted Answer

Obtain a spring bar removal tool: position the tip under the spring bar from the inside of the case, push gently until the spring compresses, then remove the strap. Repeat on the opposite side. To install the new strap, insert the spring bars into the dedicated slots, ensuring the strap ends are aligned perpendicular to the case. Always use quality tools to avoid scratching the metal.

Question 4

Which aftermarket straps are compatible with the 19mm lug width of this model?

Accepted Answer

All 19mm straps are compatible with this Constellation. Available in various materials—alligator, calf, shell cordovan—and customizable in length, initials, and stitching thread color. Casati Milano also creates bespoke made-to-measure straps with direct consultation via WhatsApp.

Question 5

How long does a leather strap last on an Omega Constellation?

Accepted Answer

Durability depends on frequency of use, climate, and leather quality. A premium alligator strap with vegetable tanning typically lasts 3-5 years with daily wear, developing authentic patina. Materials such as shell cordovan can exceed 5 years. Rotating between multiple straps, regular drying after humidity exposure, and avoiding strong twisting significantly extend the strap's lifespan.

Strap for Constellation Quartz 27 Brushed Stainless Steel / Red Gold / Diamond / MOP Omega

Straps for the Constellation 123.25.27.60.55.009 (aka: 12325276055009)

The Constellation 123.25.27.60.55.009 (aka: 12325276055009), seen from the bench

Frequently asked questions

The right strap isn't chosen. It is built, together.