SJX Watches
Hands On: Breguet Classique Tourbillon Sidéral
The Tourbillon Sidéral debuted last year to mark Breguet’s 250th anniversary. This year, the brand is celebrating the 225th anniversary of its founder’s best-known achievement: the tourbillon. For this occasion, Breguet released a quartet of new references, among them the Classique Tourbillon Sidéral ref. 7255PT, a 50-piece limited edition in platinum, once again featuring an in-house aventurine enamel dial. Initial thoughts Despite being the brand’s first-ever flying tourbillon, the Tourbillon Sidéral feels somewhat familiar. That’s because its cal. 187M1 is derived from the brand’s original wristwatch tourbillon movement, the cal. 558, released in 1989. That explains the familiar off-centre dial arrangement and full-plate architecture visible through the case back. Within this lineage, the Tourbillon Sidéral can be considered the spiritual heir and technical successor to the Classique Tourbillon Messidor 5335 released 2007, a watch that seemed to suspend its tourbillon in mid-air. In fact, this mystery tourbillon was driven by a sapphire crystal drive wheel, and its upper pivot was supported by a sapphire crystal bridge. The Tourbillon Sidéral elevates this concept to its natural conclusion, dispensing with the upper support bridge entirely, resulting in a true flying tourbillon. Unfortunately, the two-armed tourbillon cage itself spans almost the entire width of the opening, and at times resembles an upper support bridge, at least until the eye registers ...
