Rudis Sylva claims that its Harmonious Oscillator offers better isochronism than a tourbillon, since most tourbillons compensate for gravity over a one-minute period, whereas the Harmonious Oscillator offers instantaneous compensation. This is achieved in a world-first design that links two toothed balances to a single escapement. Since the energy and symmetry of the two balance springs are constantly opposed, this eliminates the effects of gravity in the vertical position. Round 44mm case in 18-carat pink or white gold, Harmonious Oscillator movement, 21,600 vibrations per hour, 70-hour power reserve, large-scale alligator leather strap with 18-carat pink or white-gold pin buckle.
Source: Europa Star April - May 2012 Magazine Issue