AT 701 GWD Tourbillon: invented by the legendary watchmaker Abraham-Louis Breguet 1801 . There is a rotating bearing of the inhibition to reduce those inaccuracy which arises when the movement is changed in its orientation with respect to gravity. such errors are largely averaged out by the rotation about its axis within a minute. A high-precision mechanics, considering that the whole Tourbillon (weighs about 4 grams, the enveloping cage consists for example of titanium) every second is completely stopped and driven back. Against 1920 , the concept of Glashütte watchmaker Alfred Helwig as "flying tourbillon" evolved.Information and details:
Model AT 701 GWD Flying 1-minute tourbillon (16 rubies mounted), mechanical, manual winding Complete stainless steel housing quality 316 L, 2 pieces, gold-plated and polished Power reserve indicator, tourbillon carriage as second indication Fine kanelierte bezel Case Diameter 39,5 mm Case Height 13 mm With Bolt-glass bottom domed sapphire crystal White dial, guilloche with Roman Index (gold polished) 9 diamonds as hour index open balance 3 ATM water resistant (splashproof) Lizard leather strap dark brown Strap width 20 mm Arm circumference about 17,9 - 22,2 cm Stainless steel folding clasp gold polished with Astboerg Logo Scope of supply: Large Astboerg Oakwood Uhrenbox Certificate & User Manual