That is obviously a bit trickier than simply moving a single screw on a balance bridge at a controlled watch, so these require more effort to get accurate, but with sufficient ability and time, they are inclined to be more stable, both in the short and long term, compared to controlled moves. Be aware that, like Rolex, Omega places its screws on the inside of the balance wheel instead of the outside. This allows them to use a bigger balance wheel without making the movement bigger. Compare this approach into the more complicated, but no more effective, ones from Breguet and Tudor.Another unique element to the 8500 and also to this 8601 is your silicon hairspring. Omega didn’t invent the silicon hairspring but they are the first company to produce them at any meaningful scale. The benefits to the silicon hairspring are primarily that it’s totally immune to magnetism and that it’s much lighter than metal alloys, which means it is less susceptible to losses of precision because of vibration. I apologize for the quality of the picture as we are reaching the very limit of what my gear is capable of, but I actually wanted to show that the hairspring.Another unique aspect to the Omega 8500 and 8601 is that this Nivachoc shock absorber, protecting the balance shaft. I have no clue what functionality benefits, if any, this offers over competing options, but it is unique nonetheless.The beautiful matching rotor is mounted on ceramic ball bearings, which can be more durable than metallic ones. The 8601 is a portion of a shrinking minority of watchmakers which are sticking with bidirectional automatic winding, meaning that this motion automatically winds in either the clockwise and counterclockwise directions. While unidirectional twisting works good, and can be used by many respected brands, I prefer bidirectional because it’s generally quieter and you can almost never feel that the rotor moving on your wrist.
Bringing together luxury and performance, Omega has consistently redefined state-of-the art mechanical watchmaking since 1884 – paving the way for precision timepieces that are captivating, inspiring, and beautifully engineered. Omega have been witness to some of mankind’s most historic moments: from having supplied NASA with the Speedmaster Professional which went on to become the first watch worn on the moon during the Apollo space missions, to being the official timekeeper to the Olympic games, witnessing some of sport’s greatest achievements.
These timepieces are characterised by pure and classic styling with luxury finishes, and exude a timeless design. This model features an impressive two-zone, white mother-of-pearl dial with gold-fashioned Roman numerals at the 6, 9 and 12 o’clock positions. The striking dial, with its date window at the 3 o’clock position, is protected by a scratch-resistant sapphire crystal. The bezel is mounted on a 32.7 mm 18K red gold case, and is presented on a brown leather strap. At the heart of this timepiece is the Co-Axial calibre 2500.