Short answer
Omega's public catalog lists no watch reference 5710. A search for "replica Omega 5710" returns listings from first copy sellers, not an entry from Omega. The number in those listings is reused, mistyped, or invented. Verify the real model before you pay.
Where the number 5710 shows up
Three places. Marketplace titles that pair 5710 with Speedmaster, Seamaster, or Constellation names. Caliber lists, because Omega uses four-digit numbers for movements in the 5000 range. And reseller spreadsheets, where one seller copies another seller's title.
Omega movement numbers and case reference numbers are separate systems. A case reference identifies a whole watch. A caliber number identifies a movement. Sellers blend the two, so buyers see numbers that never shipped together.
What "first copy" means in this trade
Sellers use "first copy," "master copy," "1:1," and "AAA" for the same tier of goods. The words describe a replica built to copy the look of a watch. No Omega factory makes these. Build quality moves by factory and by batch, not by the label on the listing.
Price ranges
- Basic tier, quartz or simple automatic: $30 to $80
- Mid tier, decorated automatic: $80 to $250
- High tier, clone-style automatic: $250 to $700
- Gold-tone or plated case: add 20 to 40 percent
Genuine Omega Speedmaster Professional Moonwatch retail sits near $7,000 USD. A genuine watch carries a serial that matches Omega service records. A replica does not.
Checks before buying
- Caseback numbers. Ask for a clear photo of the reference and serial engraving.
- Movement photo. Request a shot of the movement, not a stock image.
- Weight. Steel replica cases run 20 to 40 grams lighter than genuine parts in many models.
- Crystal. Modern Omega models use sapphire with anti-reflective coating on both sides.
- Papers. Omega ships a warranty card with a pictogram number. Few replica sellers supply a matching serial.
- Payment. Card payments give a chargeback path. Wire and crypto do not.
Legal notes for US buyers
US law bars import and sale of goods that carry counterfeit trademarks. Customs and Border Protection seizes shipments. Sellers face civil suits and, in some cases, criminal charges. Personal-use imports get limited treatment at the border, and mailed shipments can still be seized and destroyed.
Unknowns
No public source ties 5710 to a specific Omega model. Treat any listing that uses the number as unverified. Ask the seller for the factory name, the batch, and photos of the actual piece.