Omega · Constellation
Strap for Constellation Manhattan 25 Quartz Stainless Steel / Grey - Diamond / Diamond
Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Constellation 131.15.25.60.56.001 (aka: 13115256056001)
Selected for the 16 mm lug width
The Constellation 131.15.25.60.56.001 (aka: 13115256056001), seen from the bench
Frequently asked questions
What is the lug width of the Omega Constellation 131.15.25.60.56.001?
The lug width of the Constellation 131.15.25.60.56.001 is exactly 16mm. This dimension is structural and does not vary: the case lugs are spaced 16mm apart. To verify independently, measure perpendicularly with a digital caliper the distance between the two lugs, excluding the original bracelet. Any strap with standard 16mm attachments is compatible.
Which strap do you recommend for the Omega Constellation 131.15.25.60.56.001?
For this 25mm model we recommend alligator in dark tones (cognac brown or black) for a formal and long-lasting result, or vegetable-tanned calf for those who appreciate a patina that evolves over time. Shell cordovan is ideal for those seeking tactile density and natural lustre. For sports use, a cotton NATO or FKM rubber offer daily practicality. The choice depends on the context of use and personal aesthetic preference.
How do I change the strap on my Constellation 131.15.25.60.56.001?
Remove the original strap or bracelet using a spring bar tool: insert the fine tip of the tool under the lug, lift it slightly and slide the old strap outward. Position the new strap by aligning the attachment holes with the case lugs, and press with the tool until you feel the snap of the retaining spring. Repeat on the other side. If you are not experienced, the procedure is available at any local watchmaker.
Can I fit an aftermarket quality strap on this Omega?
Absolutely yes. The 131.15.25.60.56.001 accepts any strap with 16mm lug width and standard attachments. Milano Straps are manufactured with precise tolerances: alligator, calf and shell cordovan maintain structural rigidity and ergonomic comfort. What matters is ensuring that the attachments are perfectly perpendicular and that the thickness is consistent (typically 1.4-1.5mm for quality leathers).
How long does a leather strap last on a watch like the Omega Constellation?
A quality alligator or shell cordovan strap lasts on average 5-7 years with moderate use and proper maintenance (keep dry, avoid direct impact, clean regularly with a soft cloth). Vegetable-tanned calf requires similar care. Actual lifespan depends on intensity of use, frequency of water exposure and storage. A NATO or FKM rubber strap resists up to 10-12 years. Casati Milano offers an 18-month warranty on all custom straps.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

