The Pick
Buy the VS Factory version of the Omega Constellation 131.20.39.20.02.001 first. It carries the clone 8800 movement, a real ceramic bezel ring with laser cut Roman numerals, and a Sedna gold tone that holds its color. Cheaper builds get the case shape close and then lose the bracelet, the date window, or the dial brushing. If VS Factory stock has dried up in your dial color, the OR Factory build is the second choice, and the budget tier is a last resort for buyers who want the look, accept the tradeoffs, and plan to replace it later.
What to Confirm First
- Wrist size. The 131.20 is 39 mm wide and about 12 mm thick, so it wears larger than that number suggests on the steel and Sedna gold bracelet.
- Bracelet or leather. Most of the price gap between factories lives in the bracelet, so choose the configuration you will actually wear.
- Movement tier. Swiss ETA, Japanese, and Chinese clone movements all show up in this reference. Get the exact movement named in the order.
- Photos. Ask for dated, in hand photos of the exact watch, including the caseback and the clasp engraving.
How to Compare Them, Step by Step
- Tilt the watch under a lamp and study the bezel ring. The Roman numerals should be cut into polished black ceramic, sharp at the edges, with no white paint bleeding past the grooves.
- Trace the lugs with a fingertip. The lyre shape needs two separate curves and a defined ridge where they meet, which the cheapest cases smooth into one soft shape.
- Check the date aperture at 6 o'clock. It should have a stepped frame in the dial rather than a punched hole, and the date wheel should sit level with the dial surface.
- Look at where the bracelet meets the case. End links have to close the gap with no daylight and no play when you press them.
- Request a timegrapher photo. Anything from -5 to +10 seconds a day at 260 degrees of amplitude or better is a healthy copy.
- Compare the gold in daylight. Sedna gold reads warm and slightly pink, while thin plating reads yellow and turns copper within a year.
- Weigh the watch on a kitchen scale. A steel and gold bracelet build should land near 120 g, and a hollow link copy comes in well under that.
- Open and close the clasp ten times. The pushers should release with a firm click and the safety catch should not bend.
Option 1: VS Factory, the One to Buy
VS Factory gets the three parts of this watch that matter. The ceramic bezel ring is cut, not printed. The dial shows the correct vertical brushing under the silver finish, and the applied Roman numeral hour markers are polished and faceted. The clone 8800 runs at 25,200 vibrations per hour, holds the date at 6, and winds with the right resistance through the crown. Plating on the Sedna gold accents is thick enough to survive a year of daily wear. The bracelet is the weak point: center link polish is close, but clasp tolerances are looser than the genuine article.
Option 2: OR Factory, the Runner Up
OR Factory lands close on the case and dial, with bracelet edges that feel a touch softer. The bezel ring is the giveaway, since numerals on some batches sit shallow and catch light in the wrong way. Movement reliability is comparable, and the price runs ten to fifteen percent under VS. Take this one when the VS version is out of stock in the dial color you want.
Option 3: The Budget Tier
Below $250 the Constellation copies lose the ceramic bezel first, then the stepped date window. Movements are often a basic Asian automatic with low amplitude and a date change that hangs. The watch still photographs well on a leather strap. Wear it as a costume piece and expect the plating to fade, or skip it and save for the VS version.