What the 5270 Number Belongs To

Omega does not build a reference 5270. The number 5270 belongs to Patek Philippe. Reference 5270 is a perpetual calendar chronograph, 41 mm wide, launched in 2011 with caliber CH 29-535 PS Q. Omega reference numbers run in a different format, such as 310.30.42.50.01.001 for a Speedmaster Professional. A listing sold as an "Omega 5270" is one of two things: an Omega copy with an invented number, or a Patek 5270 copy filed under the wrong brand. Ask the seller which watch ships before payment.

Pick First: Hand-Wound Speedmaster Style

Start with a hand-wound Speedmaster Professional copy that carries a Seagull ST19 movement. Case 42 mm, steel, 21,600 vph, column wheel, horizontal clutch. Price band $200 to $420. Two reasons for this pick. The ST19 keeps the pushers and sub-dials in the same positions as the original. The case stays near 13.7 mm thick, against about 13.2 mm on the genuine Moonwatch.

Options After That

  1. Quartz Speedmaster: $60 to $120. On many units one sub-dial runs as a 24-hour indicator, not a chronograph counter.
  2. Automatic with a 7750 base: $280 to $500. The case grows to about 14.5 mm to 15 mm.
  3. Patek 5270 style with a calendar module: $350 to $900. Covered below.

The Patek 5270 Copy Is a Different Watch

No replica reproduces the full CH 29-535 PS Q package. On most copies the calendar shows a date wheel and a moon phase disc, while the month wheel and leap-year cam do not advance on a four-year cycle. Thickness lands near 15 mm against about 12.4 mm on a genuine 5270P. Request a photo of the movement with the caseback off. A single rotor and no calendar levers under the dial mean the calendar is a display layer only.

Points to Check on Any Unit

  • Case thickness with calipers. 15 mm on a 41 mm Patek copy is a tell.
  • Pusher count. A genuine 5270 has two rectangular pushers and one crown.
  • Engraving depth on the caseback, checked with a 10x loupe.
  • Price. A genuine 5270P trades above $150,000. A $400 listing is not that watch.

What Cannot Be Confirmed

Factory names change per batch. Movement photos from one listing do not carry to the next. Verify the unit in hand, not the catalog image.