ðə fˈɜːst fjˈuː ɡˈɪɹz ɪnðə ɡˈɪɹtɹeɪn əvən oʊmˈeɪɡə mˌɛɡəsˈɑːnɪk ɹˈɪstwɑːtʃ hæv nˈoʊ tˈiːθ; ɪnstˈɛd, mæɡnˈɛɾɪk nˈɔːɹθ ænd sˈaʊθ pˈoʊlz ˌɔn nˈeɪbɚɹɪŋ ɡˈɪɹz ˈækt lˈaɪk ðə tˈiːθ ænd tɹˈɔf ʌv spˈɜː ɡˈɪɹz, ɐlˈaʊɪŋ ˈiːtʃ ɡˈɪɹ tə dɹˈaɪv ðə nˈɛkst ɡˈɪɹ ɪnðə tʃˈeɪn.
The first few gears in the geartrain of an Omega Megasonic wristwatch have no teeth; instead, magnetic north and south poles on neighboring gears act like the teeth and trough of spur gears, allowing each gear to drive the next gear in the chain.