Short answer

The Audemars Piguet Royal Oak Offshore reference 25940 is a 42 mm steel chronograph from the mid-2000s, part of the Offshore "Themes" group that included the Safari and the Navy. A rubber-clad crown and rubber-clad pushers set it apart from the 1993 original. Replica versions range from rough to close. A useful copy matches the case profile, the eight hex screws on the octagonal bezel, the Méga Tapisserie dial texture, and the date at 3 o'clock. Almost all replicas run a Chinese-made 7750 automatic movement, not the Frédéric Piguet-based calibre found in the real watch.

Reference points on the original

  • Case: steel, 42 mm wide, about 14.5 mm thick.
  • Bezel: octagonal, eight hex screws, brushed top with polished bevels.
  • Dial: Méga Tapisserie grid, three subdials, date at 3 o'clock.
  • Crown and pushers: rubber clad.
  • Crystal: sapphire front and back. Water resistance: 100 m.
  • Movement: AP automatic chronograph on a Frédéric Piguet ébauche, about 28,800 vph. Exact calibre numbers vary by year and by listing, so confirm against the brand archive.

What separates a good replica

  1. Case size. Measure it. Sellers list 42 mm; cases near 12 mm thick do not match the reference.
  2. Screw count and shape. Eight hex screws with even spacing.
  3. Dial pattern. Méga Tapisserie squares are large and raised. A flat printed grid is a downgrade.
  4. Subdial positions. Compare against photos of the reference. A 7750 layout often sits 1 mm to 2 mm off.
  5. Date window. Position at 3, font, and magnification.
  6. Rubber on the crown and pushers. Many copies leave them bare metal.
  7. Caseback engraving. Depth of the reference, serial, and movement text.

Price and market

Copies sell from about $250 to $800. Above that range, buyers pay for finish and for movement swaps. Genuine 25940 watches trade on the secondary market, and asking prices move with dial color, box, and papers.

What no replica matches

Movement finishing, hand-applied bevels, and the feel of the chronograph pushers. Service access is the other gap: watchmakers take genuine AP calibres and refuse most copies. Weight sits close on steel copies, but strap hardware and clasp markings show the difference.

Before you buy

  • Ask for photos of the caseback and the movement.
  • Confirm the return window in writing.
  • Check the subdial layout against reference photos.
  • Verify strap size and buckle markings.