What "replica Constellation 131.13" means
131.13 is the first part of an Omega reference number. It is not a complete model number. Omega writes references in segments. The leading digits name the family. Groups that start with 131 sit in the Constellation line under current Omega numbering. The segments after that encode case size, case material, bezel, dial and bracelet.
A short number such as 131.13 does not identify one watch. Two Constellation models can share the 131.13 prefix and differ in diameter, dial color and metal. Buyers who search the short number get mixed listings.
What the Constellation line is
Omega launched the Constellation in 1952. Early models used a pie-pan dial and a chronometer-rated automatic movement. The modern version keeps two case details. There are claws at 3 and 9 o'clock. The mono-rang bracelet sits flush against the case.
Current Constellation cases measure 25, 28, 29, 35, 38 and 41 mm, depending on the reference. Men's sizes cluster at 35, 38 and 41 mm. Women's sizes cluster at 25, 28 and 29 mm.
Most current models run a Co-Axial Master Chronometer caliber. METAS certifies these movements against eight criteria. Two of them are exposure to a 15,000-gauss magnetic field and a daily rate of 0 to +5 seconds.
Parts a replica has to reproduce
- Case: claws at 3 and 9, half-moon facets on the lugs, mixed polished and brushed surfaces.
- Bezel: plain polished ring, or a ring engraved with Roman numerals, depending on the reference.
- Bracelet: mono-rang links, no visible gap to the case, butterfly clasp with the Omega logo.
- Dial: applied indexes, dauphine or alpha hands, date window at 3 or 6 o'clock depending on model.
- Caseback: engraved constellation emblem on older builds, sapphire window on Master Chronometer builds.
- Movement: decorated automatic, cloned Co-Axial, or a quartz substitute in the cheapest builds.
How to check a replica before paying
- Ask for the full 11-digit reference, not the 131.13 prefix alone.
- Ask for caliper photos of case diameter, lug-to-lug and thickness. Compare them to the Omega spec sheet for that reference.
- Ask for a weight. A 38 mm stainless steel Constellation on its bracelet generally lands near 120 to 150 g. Many replicas weigh less.
- Ask for a photo of the clasp code and the caseback engraving.
- Ask which movement is inside, and whether the rotor carries decoration.
- Ask for the return window in writing.
Price ranges
Entry replicas with quartz or a basic automatic movement sell for about 60 to 150 USD. Mid-tier automatic replicas sell for about 200 to 400 USD. High-end builds with cloned movements and sapphire on both sides sell for about 400 to 700 USD. Prices move with the seller and the exchange rate.
What replicas do not match
No replica carries a METAS certificate. Serial numbers on fakes do not resolve in Omega's system. Gold content differs. Two-tone replicas use gold plating, not solid gold caps. Servicing is limited, because independent watchmakers rarely stock parts for cloned Co-Axial movements.
Treat the purchase as a costume watch. Quartz and entry automatic versions keep time. They do not hold value.