The "291" tag in a listing is a seller batch code, not an Omega reference number. It marks one production run of replica Seamaster 300M watches. Two sellers can print the same number on different watches, and a new run can replace it at any time. Buy the watch in front of you, not the label.
Prerequisites
- A 10x loupe
- Digital calipers
- Bright, angled light
- Macro photos of a genuine Seamaster Diver 300M for side-by-side checks
- The seller's return terms in writing
Inspection Steps
- Measure the case with calipers. The genuine Seamaster Diver 300M runs 42 mm across, and most replicas land within 0.3 mm. A 40 mm or 44 mm case is a different watch.
- Check the lug width and bracelet end links. Genuine lugs sit at 20 mm with flush end links and no gaps at the case.
- Turn the bezel. It should click through 60 positions with no back play and no scraping. Replica inserts often show off-color markings or a pip that sits off center.
- Study the dial under the loupe. Look at the wave pattern lines, the weight of the "Seamaster" text, and the Omega logo. Replica dials show thick or jagged printing, or a wave pattern that fades toward the center.
- Examine the date window. Check its position at 6 o'clock, the frame finish, and the cyclops alignment on the crystal. A shifted cyclops is one of the simplest tells.
- Inspect the crown guards and the helium escape valve at 10 o'clock. The valve should sit flush with the case, and the crown should screw down with clean threads.
- Charge the lume with a phone light, then compare color and brightness against reference photos. Replica lume fades faster and often reads a different shade.
- Ask the seller to run a timegrapher test and send the reading. Look for about 28,800 beats per hour, amplitude above 250 degrees, and a beat error under 0.5 ms.
Movement and Construction
Replicas at this price point often run a clone ETA 2824 or an Asian automatic with a decorated rotor. Ask which movement is inside, then judge the finish of the rotor, the winding feel, and the sweep of the seconds hand. A rough winding feel or a jumping seconds hand points to a low grade unit. The caseback engraving should match the case shape, and the gaskets should sit flat in their grooves.
Red Flags
- The seller answers questions about the 291 code with marketing talk instead of part details.
- No return window, or terms that exclude a change of mind.
- Photos that hide the date window, the crown, or the caseback.
- Water resistance claims with no pressure test behind them.
- A price far below the normal range for this tier, which points to a lower grade watch and a swapped photo set.
Pricing and Returns
Mid tier Seamaster 300M replicas sell in a narrow band, and a "291" label does not raise that band. Get the return terms in writing before payment, and pay with a method that allows a dispute. Request photos of the actual watch, including the serial area, and not stock images.
After Delivery
- Photograph the watch on arrival before you wear it.
- Compare the caseback engraving to the seller's photos.
- Skip swimming until a watchmaker pressure tests the gaskets.
- Log timekeeping for three days to spot rate drift.