Omega · Constellation

Strap for Constellation Automatic 27.5 My Choice Yellow Gold / MOP

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter28 mm
Reference1391.71.00
FamilyConstellation
MovementOmega caliber 2520 hours, minutes, seconds | date
CaseMother of Pearl | Yellow Gold, Stainless Steel

Recommended spring bar

Spring bars Omega 18mm — single diameter

Technical match for lug width and diameter · lug 18 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Constellation 1391.71.00

Selected for the 18 mm lug width

All 18 mm straps →

The Constellation 1391.71.00, seen from the bench

The Omega Constellation Automatic 27.5 My Choice Yellow Gold / MOP (ref. 1391.71.00) features a 27.50mm two-tone case in 18k yellow gold and stainless steel, distinguished by the iconic four leonine griffes. The iridescent mother-of-pearl dial shifts from white to blue tones with viewing angle. Powered by the Omega 2520 calibre with coaxial escapement and thermal compensation, it includes a date window at 3 o'clock. The 18mm lug width is proportioned to the compact case diameter for optimal wrist balance and secure strap attachment.

Frequently asked questions

What is the exact lug width of the Omega Constellation 1391.71.00?

The lug width of the Constellation 1391.71.00 is 18mm. This width is determined by the internal distance between the attachment pins and is specific to this model. Using straps of different width would result in improper fitting and could damage the case.

What strap material is most recommended for the Constellation 1391.71.00?

Alligator represents the ideal pairing thanks to its fine grain that perfectly proportions to the compact case dimensions (27.50mm). Vegetable-tanned calf offers a more contemporary alternative, while shell cordovan provides structure and brilliance. The choice depends on the context of use: elegant for alligator, versatile for calf, sporty-formal for cordovan.

How do you change the strap on an Omega Constellation?

Changing the strap requires a specific tool called a spring bar tool. Position the watch with the case side facing you, locate the small hole beside each pin and insert the tool to slide the pin out of the lugs. Reverse the procedure for the new strap. If you are not experienced, consult a professional to avoid scratching the case.

Are aftermarket straps compatible with the Constellation 1391.71.00?

Yes, provided they are certified for 18mm lug width. Milanostraps offers a complete collection of handcrafted compatible straps, customizable in leather, color and details. Before purchasing, always verify that the seller specifies compatibility with this measurement, as straps that are even slightly oversized compromise the fitting.

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

Durability depends on daily use and leather quality. A premium alligator or calf, with minimal maintenance (avoid standing water, abrasive cleaners), typically lasts 4-6 years with regular wear. Vegetable-tanned leather tends to last slightly less than chrome-tanned leather. Milanostraps guarantees its straps for 18 months from purchase, with the option of replacement if deterioration is anomalous.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only