Offshore at 42mm is the most wearable size in the line and the entry point for ROO collectors watching secondary prices.
The Royal Oak Offshore Diver 15710 is the sportiest AP steel watch and trades at a meaningful discount to the non-diver Offshore; dial color has a significant effect on secondary prices, with limited editions commanding premiums.
The Royal Oak Offshore Diver 15710 is AP's full dive watch interpretation of the Offshore platform: 300 meters of water resistance, a rotating inner bezel, and the same oversized 42mm presence that defines the Offshore line. It ran from 2016 to 2021, giving it a tighter production window than most AP sport references. Collectors pick it up for the combination of genuine dive utility and the Offshore's deliberately aggressive architecture.
AP produced the 15710ST.OO.A002CA.02 from 2016 to 2021 before discontinuing the reference. The case is 316L stainless steel at 42mm, fitted with a unidirectional rotating inner dive bezel rather than an external bezel , a functional choice that keeps the crown-and-case profile cleaner. Power comes from Caliber 3120, AP's in-house integrated automatic with a 60-hour power reserve and a 22k gold rotor.
The reference shipped in multiple dial configurations across the production run, with the blue dial variants drawing the most collector interest. AP has not issued a direct replacement, which has sharpened secondary-market attention on the 15710 since the discontinuation.
The inner rotating bezel is the first thing to inspect: the mechanism should click positively and the graduation printing should be sharp with no fade or lifting. Crown and pushers take more abuse on dive watches, so verify the crown screws down firmly and the gaskets have been replaced within the recommended interval. Check the sapphire crystal for chips at the edge, since the recessed inner bezel design concentrates any impact stress there.
Lug wear is common on Offshore cases that have been worn without straps, and polishing is frequently used to hide it; the brushed and polished surfaces should still show their original finishing transitions. Confirm the reference number on the caseback matches the 15710ST designation, since the Offshore Diver family has multiple references that look similar at a glance.
The 15710 trades in the $15,000 to $20,000 USD range on the secondary market depending on condition and dial color. Blue dial examples consistently clear the top of that range and occasionally push above it, particularly when accompanied by box and papers. The 2021 discontinuation has added a floor to pricing that was not there when the reference was in production.
Full-set examples with unworn bracelet and original warranty card carry a meaningful premium over watch-only offerings, sometimes 15 to 20 percent, which is worth knowing if you are negotiating on a bracelet-only listing.
Caliber 3120 is AP's own integrated automatic and AP recommends service every five to eight years for this movement, with documented examples running longer between intervals without incident. Full service at an AP authorized service center typically runs $1,200 to $1,800 USD and includes movement service, seal replacement, and pressure testing to the 300-meter rating. Given the dive specification, do not defer a service if the watch has seen real water use or if the service history is unknown at purchase.
Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal — the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.
The Mega Tapisserie dial pattern is the fastest visual tell separating the Offshore Diver from the standard Royal Oak.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | Mega Tapisserie pattern scale | Larger grid squares than standard Royal Oak Tapisserie; grid is visibly coarser and bolder at arm's length | Fine-grid standard Tapisserie inconsistent with Offshore Diver specification; standard Royal Oak dial in an Offshore case |
| crown | Rubber-clad crown | Original rubber surround intact, no cracking or shrinkage; crown operates the inner rotating bezel smoothly | Cracked, shrunken, or missing rubber surround; crown engaging an external bezel (15710 has inner rotating bezel) |
| caseback | Cal. 3120 identification | AP caliber markings consistent with Cal. 3120; 21,600 bph movement architecture; 60h power reserve | Non-AP movement; caliber markings inconsistent with Cal. 3120; movement architecture not matching AP in-house design |
Editorial estimate. Actual prices vary by condition, date, and box/papers status. Live pricing data is in development.
