Its dial features a unique red military scale, and its case is made of polished, scratch-resistant grade 5 titanium. This watch pays tribute to the TAG Heuer's first diving watch, the ref. WBP208C.FT6201 is a limited-edition Professional 300 with a production run of only 844 pieces. Other standard-edition Professional models in stainless steel demand similar prices. As of spring 2021, this reference's market value and list price are nearly identical, with both sitting at 3,000 USD. WBP201A.BA0632 is the most classic edition and has a black dial and ceramic bezel. Finally, thanks to its new quick-adjust system, you can adjust the bracelet's length with the clasp closed. TAG Heuer also updated the bezel, which now has a fully fluted edge and a smoother rotation mechanism. The date's magnifying lens sits on the inside of the crystal, thus keeping the crystal's outer surface smooth. Another notable change is the date display's position, which has shifted from 3 to 6 o'clock. The 2021 Professional 300 models feature flatter cases and bezels. At the same time, the company announced a limited edition with a design based on the ref. These latest additions include a titanium watch with a green dial and matching green bezel. In 2021, the manufacturer treated the standard-edition Aquaracer to an update and added eight new three-hand models to the Professional series. TAG Heuer gives these movements names like "Calibre 5," "Calibre 7," and "Calibre 16." Each watch houses a movement based on a Swiss caliber from either ETA or Sellita. There are also versions for fans of GMT watches, including models with a Pepsi bezel. Most Aquaracers come in stainless steel, though there are several titanium models, as well as editions with black PVD coatings or a carbon aesthetic. TAG Heuer also produces professional editions that can dive down to 500 m (50 bar, 1,640 ft) and feature helium escape valves, making them well-suited to saturation diving. Most versions are water-resistant to 300 m (30 bar, 984 ft). Each model features a unidirectional bezel for measuring dive times. The collection contains a wide range of automatic three-hand watches and chronographs. Select models are among this Swiss manufacturer's most highly coveted timepieces. The watches of the TAG Heuer Aquaracer collection are perhaps best described as sporty, functional, and robust.