Short answer

A replica Omega Seamaster Diver 300 is a copy of the 42 mm dive watch Omega released in 2018. Prices run $80 to $600. Top-tier copies match case size, bezel material, and crystal type. Movement finish, date font, and water resistance do not match. Omega lists the steel-bracelet version in the $5,000 to $7,000 range.

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Genuine baseline: the numbers copies target

  • Case: 42 mm wide, 13.6 mm thick, 20 mm lug width, 49.9 mm lug to lug.
  • Caseback: wave edge, Seahorse medallion, engraved reference and serial.
  • Water resistance: 300 m, tested at the factory.
  • Crystal: domed sapphire, anti-reflective coating on both faces.
  • Bezel: ceramic insert, white dive scale, 120 click rotation.
  • Dial: ceramic base, laser-cut wave pattern, date window at 6 o'clock.
  • Valve: helium escape valve at the 10 o'clock position.
  • Movement: Calibre 8800, co-axial escapement, 55-hour power reserve, 25,200 vph, 15,000 gauss magnetic resistance, METAS Master Chronometer certification.
  • Bracelet: steel, push-button clasp with diver's extension, 20 mm end links.

Replica tiers

  • $80 to $150: 316L steel case, mineral glass, quartz or low-grade automatic, printed dial waves, aluminum bezel insert.
  • $180 to $300: 316L steel, sapphire crystal, Seagull ST2130 or Miyota 8215, ceramic bezel insert, stamped clasp.
  • $350 to $600: 316L or 904L steel, AR-coated sapphire, ETA 2824 clone or a movement sold as a clone 8800, ceramic bezel insert with enamel paint, engraved caseback, solid end links.

Movements inside copies

Factory pages name three movements. The Asia 2824 and its Seagull ST2130 twin run at 28,800 vph with 38 to 42 hours of reserve. The ETA 2824-2 has the same layout at 28,800 vph. Sellers that advertise a clone 8800 ship a decorated 2824-type with an Omega-style rotor and bridge plates. The genuine 8800 runs at 25,200 vph. Put a timing app on the watch and read the beat number. That test needs no case opening.

Omega Seamaster 300 Replica: The Ultimate Guide

Checks before you buy

  1. Measure the case: 42 mm across, 13.6 mm thick, 20 mm lugs.
  2. Look at the date: window at 6 o'clock, black disc, white numerals, no magnifier bubble.
  3. Turn the bezel: 120 clicks, no back play, white scale on ceramic.
  4. Check the crystal: domed sapphire, faint blue or purple AR tint, low glare from the front.
  5. Check the lume: blue glow on hands and markers after daylight charge.
  6. Check the clasp: push-button release, diver's extension, Omega stamp on the fold.
  7. Ask for photos of the caseback engraving and the serial.

Where copies differ

Movement finish sits under a solid caseback, so it shows less than the outside. Visible gaps: dial wave depth, print sharpness on the bezel scale, crown action, bracelet screw heads against pins, clasp stamping, lume brightness. Budget copies use thinner steel, so the watch feels light in the hand. Top copies come close on weight.

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Water resistance

No replica factory ships a pressure test report. Gaskets are fitted and casebacks are screwed down, but the 300 m rating is not verified. Showering is a risk. Swimming and diving are a larger risk. Treat a copy as splash resistant.

omega replica seamaster diver 300

Service and legal notes

Independent watchmakers often decline replica work. Parts come from the same factories that built the watch, so a service can take weeks. In the US, trafficking in counterfeit goods with a protected mark carries penalties under 18 U.S.C. 2320. Customs can seize shipments.

FAQ

Which factory makes the closest copy?

VS Factory, ORF, and ZF are the names cited most in buyer threads. No independent lab publishes test data on them. Treat factory names as seller claims.

Does the helium valve work?

On most copies the valve is a fixed crown with a gasket. It does not vent. Normal wear is unaffected.

How long does a copy last?

Two to five years of daily wear for a 2824-type movement. A clean and re-oil runs $100 to $200 at a shop that takes replica work.

Will it pass as the real thing?

At arm's length, often. In hand, a jeweler or an owner can check the beat rate, the date font, and the clasp stamp. Assume it will be spotted.