Tudor Black Bay GMT

Tudor added the Black Bay GMT to its beloved diving watch collection in 2018. This model is capable of displaying up to three times zones at once. The Swiss manufacturer clearly took inspiration from one of its sister company's most iconic watches, the Rolex GMT-Master, when designing this timepiece.

The Black Bay GMT even shares a color scheme with its famous Rolex cousin. Both feature a bidirectional 24-hour bezel in the beloved blue and red "Pepsi" design. The dial is matte black with applied indices and a date display at 3 o'clock. While most of the hour markers are dot indices, there are rectangular bar indices for 6 and 9 o'clock, as well as an inverted triangle at 12. White luminous material fills the hands and indices. Only the central 24-hour hand stands out in bright red, though its tip also glows bright white in the dark.

That being said, the Black Bay GMT is anything but a copy of the GMT-Master. It boasts everything that makes the Black Bay collection so popular, including a 41-mm stainless steel case, large crown without a crown guard, and domed sapphire crystal without a magnifying lens. Perhaps the most notable feature that sets this model apart is its square-tipped "snowflake" hands. What's more, the Black Bay GMT is water-resistant to 200 m (20 bar, 656 ft), while the GMT-Master is only rated to 100 m (10 bar, 328 ft).

The Tudor in-house caliber MT5652 powers the Black Bay GMT. Paired with the bezel, it can display up to three time zones simultaneously. It also has a 70-hour power reserve and comes with chronometer certification from the Official Swiss Chronometer Testing Institute (COSC).

You can purchase a mint-condition Black Bay GMT on a leather or textile strap for around 4,200 USD. The same watch on a steel bracelet demands roughly 4,400 USD.

The Black Bay GMT measures 41 mm in diameter. Its stainless steel case is satin-brushed on both the top and bottom, while the polished sides add a touch of elegance. The bezel is also made of stainless steel. It features a 24-hour track with a red and blue anodized aluminum inlay.

Tudor offers this watch on a stainless steel bracelet under the reference number M79830RB-0001. Like the case, the bracelet links have brushed tops and bottoms and polished sides. The designers decided to mimic the look of the riveted bracelets popular in the 1950s and 60s. However, the Black Bay's links actually screw together, so the rivets are purely decorative. Plan to spend about 4,400 USD on a new timepiece.

If you're not a big fan of metal bracelets, you may prefer the ref. M79830RB-0002. This model comes on a distressed "Terra di Siena" leather strap. The red-brown hue lends this watch a particularly rustic look. You can purchase a mint-condition timepiece on Chrono24 for around 4,200 USD.

Tudor pairs the third version of the Black Bay GMT, the ref. M79830RB-0003, with a black textile strap. A red line runs down the strap's center for an extra sporty touch. Unlike the steel and leather editions, which both use a folding safety clasp, the textile strap comes with a pin buckle. Prices for this model sit around 4,200 USD.

Tudor developed the caliber MT5652 specifically for the Black Bay GMT. This movement is based on the in-house caliber MT5602, which first appeared in 2015. It ticks at a frequency of 28,800 vibrations per hour (vph) and has a 70-hour power reserve. It's also resistant to strong magnetic fields thanks to its silicon balance spring. Not even strong jolts can knock this movement out of sync since its balance is held in place by bridges instead of conventional balance cocks. The MT5652 is also a COSC-certified chronometer, meaning it is extremely accurate.

Tudor has put just as much care into the caliber's GMT function. Like its Rolex counterpart, the MT5652 enables the wearer to set local and home time zones separately. For example, to adjust the local time, you simply pull the crown out to its first position to move the hour hand forward or backward in one-hour increments without having to stop the watch completely. The movement is even able to account for date changes.