Agelocer Crystal bezel Free-Sprung Double-sided hollow flying Tourbillon Watch Ref .9001F2 watch in excellent conditions timegrapher shows perfect values : 4 sec/day shipping with dhl ups no import duties for europe countries Delivery times may vary 1-2 weeks depending on the destination country. Movement: Cal.A9001 manual machinery Functions: Hour and minute hands in the center, flying tourbillon Case: 316L stainless steel, diameter 40mm Watch mirror: synthetic sapphire crystal glass Bottom cover: 32mm transparent panoramic back cover Strap: crocodile pattern leather strap Buckle: 316L stainless steel folding buckle Case thickness: 10mm Strap width: 20mm Wearing length: 170mm-210mm Kinetic energy: 80h Weight: 66.8g Product features: Suspension-free flying tourbillon design, 360-degree rotating escapement system can balance the influence of the gravity, to enhance the accuracy of time traveling. Finepolished self-developed movement, double-sided transparent hollow design, Incabloc triangle shock absorber, 25 synthetic ruby bearings, satin wiredrawing decoration. Double-sided hollow flying tourbillon The tourbillon watch represents the highest level in the manufacturing process of a mechanical watch. The entire escapement speed-regulating mechanism is combined together and can continuously rotate to minimize the influence of gravity on the "escapement system" of the mechanical watch and enhance the time-traveling accuracy. The flying tourbillon is a more advanced technology in the tourbillon, improving the mystery and dynamic artistic beauty of the watch when it is running. AGELOCER flying tourbillon series use a finely polished self-developed movement. The double-sided transparent hollow design eliminates unnecessary splints and leaves the rigid skeleton of the movement only, allowing people to intuitively feel the mechanical aesthetics and slow moving of time.