Audemars Piguet Royal Oak Offshore Diver 15720ST: The Turquoise Diver Up Close
Table of Contents
Watch the full unboxing
We had both colorways of the Audemars Piguet Royal Oak Offshore Diver in hand for this one, and the turquoise 15720ST is the one we kept coming back to. It is a full Offshore in every way that matters: the octagonal Royal Oak case, eight hexagonal screws on the bezel, and a 300-meter dive rating. The turquoise runs through the dive bezel's 15-minute zone, the dial accents, and the rubber strap, so the color ties the whole watch together. It still looks and wears like a proper tool diver. Here is a closer look at reference 15720ST.OO.A355CA.01.
The 42mm steel case with its black inner dive bezel and turquoise 15-minute zone.
A Royal Oak Offshore Built to Dive
The case is 42mm of stainless steel, brushed on the top surfaces and polished on the bevels, in the shape the Offshore has used for years. The outer octagonal bezel is fixed, and the dive scale runs on a separate inner bezel that rotates under the crystal. It carries 300 meters of water resistance and a real dive function. There are two black ceramic screw-down crowns. The one at 10 o'clock turns that inner rotating bezel so you can track elapsed time, and the crown at 3 o'clock sets the time and date. The ceramic adds scratch resistance and gives the watch a more technical, sporty look than plain steel would.
The octagonal case from the back, with a black ceramic crown and the turquoise strap.
The Turquoise Dial and Its Lume
The dial is black with the large Mega Tapisserie waffle pattern AP uses on its sportier pieces. The applied hour markers and hands are filled with lume, and the black inner bezel carries a turquoise 15-minute zone with a lume triangle at the top. There is a date window at 3 o'clock, and the dial reads "300m / 1000ft Automatic" under the AP logo. Against all that black, the turquoise reads a bit more classic than the brighter dial options, which is part of why we liked it.
The Mega Tapisserie dial with the date window at 3 o'clock.
The lume is one of the better parts of this watch. You get glow on the markers and hands, and also on the turquoise accents in the inner bezel. Under UV it lights up across the whole dial, so reading elapsed time in low light is easy.
Lume on the hands, markers, and the inner bezel accents.
Inside: The Caliber 4308
Turn it over and there is a sapphire caseback, with "Royal Oak Offshore" and "Audemars Piguet" engraved around the surround. Inside is the AP self-winding Caliber 4308, an automatic with a 60-hour power reserve. Nothing exotic here, just a reliable everyday movement you can watch wind through the back.
The Caliber 4308 through the sapphire caseback.
Size, Weight, and Wearability
The official case thickness is 14.2mm. On our own calipers we measured a touch more, closer to 14.5mm, with a lug-to-lug just under 54mm. On the scale the watch and strap came in at about 176 grams, so you get real presence without it feeling like a brick. On a 7-inch wrist it wears big but not over the top. It still feels like a proper bold Offshore, and that is how we like it.
About 176 grams on our scale, strap included.
On a 7-inch wrist it wears bold but stays wearable.
The turquoise rubber strap keeps the look cohesive, and like other Offshore Divers it swaps out on the integrated system if you want to change the strap later.
Turquoise or Pink: The Miami Duo
We had the turquoise and the pink versions side by side, and together they make a killer Miami duo. Same case, same dial pattern, same movement. The difference is the color running through the bezel's 15-minute zone, the accents, and the strap. The turquoise is the more versatile of the two, and the pink is louder. Both are honest Offshore Divers under the color.
The turquoise and pink Divers together.
In the Box
The 15720ST arrives in the green Audemars Piguet Le Brassus presentation box. These colorful boutique Divers do not sit in cases waiting for walk-ins, so we source them through the grey and secondary market. That is the market we work in every day, and it is why we tend to have references like this one when people are looking.
The Audemars Piguet Le Brassus box.
The 15720ST in its case, with the reference and 42mm size on the card.
FAQ
What is the full reference for this turquoise Offshore Diver?
It is the Audemars Piguet Royal Oak Offshore Diver 15720ST.OO.A355CA.01. That is the 42mm stainless steel case with the black Mega Tapisserie dial, a black dive bezel with a turquoise 15-minute zone, and a matching turquoise rubber strap.
Is the Royal Oak Offshore Diver a real dive watch?
Yes. It has 300 meters of water resistance, an internal rotating dive bezel controlled by the crown at 10 o'clock, and full lume on the hands, markers, and bezel. It is a proper diver, not just a sporty look.
What movement is inside the 15720ST?
The AP self-winding Caliber 4308, an automatic movement with a 60-hour power reserve. You can see it through the sapphire caseback, which is engraved "Royal Oak Offshore" around the surround.
How big does it wear at 42mm?
It has real presence. The case is 42mm wide and 14.2mm thick on paper (a touch more on our calipers), and with the strap it weighs about 176 grams. On a 7-inch wrist it wears big but stays comfortable, in line with what a bold Offshore should feel like.