I received my first Chinese tourbillon watch this week - a Sea-Gull designer series 818.937. It's a model I haven't seen around here before, so I thought I'd post a review.Here's the short review: This is a stunning, beautifully executed watch. It exudes class and luxury, without being showy or pretentious. It's simply a great dress watch - not just for the price, but a great dress watch, period.Now for the more in-depth review.I've long admired Sea-Gull's tourbillon watches, but they've always been out of my price range. However, last month they became a lot more affordable for most people. The team over at www.seagullwatchstore.com have negotiated a deal with the Tianjin Sea-Gull watch company to offer discounts on all Sea-Gull tourbillon watches, exclusively to the foreign market. They're on sale now for 40 per cent off the official price, as listed at the manufacturer's site . Limited editions are also on offer with a 20 per cent discount. The site is also offering steep discounts on Sea-Gull 1963 and D304 chronograph watches.The tourbillon I went for is the Sea-Gull 818.937 . It's part of Sea-Gull's designer series, which features watches with clean, modern lines. Sea-Gull also offers a number of more more classically styled tourbillons, but the designer series watches suit my tastes much better.The 818.937 is a dress watch cased in premium 316L stainless steel. The case measures 41mm across without the crown and 10mm high, with a lug width of 21mm. The finishing of the case is of very high quality - much, much better than any watch I've owned previously.The case has an appealing mix of brushed and polished surfaces. The bezel and top of the lugs have a beautiful mirror polish finish which is very finely executed. Between the lugs, the case has a coin edge design, with a polished finish on the raised surfaces and a brushed finish on the recessed surfaces. It's a thoughtful, well-executed design that really speaks to the craftsmanship that went into this timepiece.The sides of the lugs, and part of the case, are finely brushed, which gives a nice contrast to the polished bezel and upper lugs. The sides again feature the same coin edge design used between the lugs. On the right side is a small, recessed pusher for changing the date, and the signed crown. The Sea-Gull logo on the crown is polished, and sits atop a brushed recess. It's a nice touch.The dial is a beautiful white colour which, upon close inspection, has the texture of incredibly fine sandpaper. The 818.937 is also available in black and blue variants, but I like the crispness of the classic white dial.The hour indices are applied silver-coloured batons. There are two smaller batons at 12 o'clock, and there is no baton at 6 o'clock, where the tourbillon window sits. The minutes are marked on the pure white chapter ring, which proudly reads 'China Made' just below the tourbillon window. The chapter ring slopes down from the crystal to the dial, adding depth.The dial features four subdials. Each subdial has a small border with a enamel-like finish, which provides a subtle contrast to the matte dial. The subdials at 12, 3 and 9 o'clock are all slightly recessed.The 12 o'clock subdial is a power reserve indicator, showing up to 40 hours reserve. This is incredibly useful as the Sea-Gull ST8007 movement that powers the watch is hand-wound. It's easy to tell, at a glance, whether your watch needs another wind to keep it ticking. The 3 o'clock subdial shows the date, which changes over automatically at midnight, or can be set via the pusher on the side. The 9 o'clock subdial has a 24-hour indicator and a sun-moon indicator. The latter is particularly beautiful - it is a deep, rich blue, with the sun and moon finished in a subtle matte gold. The fourth subdial is, of course, the tourbillon window.The hands are of a sword design and are finished in lustrous 18k white gold, which reflects the light beautifully. The hour and minute hands are elegantly proportioned, making it easy to tell the time. There is no second hand - instead, the seconds are marked by a small diamond at the tip of the tourbillon, which rotates once every minute. It's a nice, practical use for an arguably impractical complication.The tourbillon itself is beautifully finished. There's a nice mix of steel and what looks to be brass. The diamond at the tip, the ruby on the balance wheel and two blued screws and an extra touch of colour.The dial sits beneath sapphire glass. The crystal reflects light marvelously, and really helps to make the whole dial pop.The back of the case is held in place by a series of screws. It's inscribed between the screws with the model number, water resistance (50m), maker and case material. The bulk of the back is a nice display crystal, which lets you admire the rear of the ST8007 movement. The flying tourbillon is attached at the bottom at three points - this is what allows the tourbillon to look as though it is flying when viewed from the top. You can see right through the tourbillon to the other side of the case and beyond. The rest of the movement back features a steel plate with nicely finished Geneva stripes and inscribed text with a gold finish. There are four wheels, each affixed with blued screws, which you can see in action when you wind the crown.The ST8007 is a fairly practical movement for a tourbillon. Hand-winding is firm but smooth. The movement has been keeping good time - I've worn the watch continuously during waking hours for the last few days, and it's gained only 10 seconds. It is quite loud - you can hear the tourbillon ticking away when you're in a quiet room. But that's the trade-off for being able to watch the tourbillon in action, which is nothing short of mesmersing. I've found myself idly staring at it many times over the last few days.The watch comes on a nicely finished black alligator strap. It's an elegant choice which is befitting for a luxury dress watch.It's stiff but not inflexible and quite comfortable on the wrist. That's in no small part thanks to the soft leather lining.The strap closes with a Sea-Gull signed stainless steel deployant clasp. It's a quality clasp with push-button action, and it would be very hard for it to accidentally come undone.One issue with the strap is its stiffness makes an audible creaking noise when moving my wrist. Hopefully the stiffness will decrease with wear and the sound will stop. Another issue for some people might be the uneven 21mm lug width, which makes it harder to find decent alternative strap choices. However, I recently discovered UK seller Sectime has a number of quality 21mm straps , so I tried one out on the Sea-Gull.It worked really well in dressing down the watch. The Sea-Gull didn't feel at all out of place with my go-to smart casual look - brown leather shoes, light-coloured chinos and a nice shirt.That said, I do like the croc/alligator look of the original strap, so I think I'll pick up a brown crocodile strap from Sectime to add variety.On the wrist, the Sea-Gull feels great. It hugs nicely to my 6.5 inch wrist and it's the perfect size - not too big, not too small.It has real wrist presence at 10mm tall, but it doesn't feel bulky.The watch slips easily under a button-cuff shirt, making it ideal for the office or formal occasions.Here's a shot on the brown leather for comparison.The watch comes in a nice wooden box, which looks great on my dresser.Inside the box is a Sea-Gull tourbillon booklet which covers the history of the brand, what a tourbillon is, how to use the watch, and a catalogue of all current tourbillon models.It also comes with a certificate of authenticity from Sea-Gull.Seagullwatchstore.com ships all their tourbillons by DHL. Mine arrived very well packed within five days. Communication with the seller was, as always, excellent - polite, prompt and helpful.Overall, I wouldn't hesitate to recommend this watch if you're looking for a tourbillon, or a luxury timepiece in general. It's a brilliantly executed package that just oozes quality, class and style.I'll treasure this watch and, one day, I'll hand it down to my son.