Inspired by the concept of "Infiniti Red Bull Racing", Casio created a layered edge 3-D shield EF-550D chronograph watch in pursuit of more dynamic styling & higher quality. Edifice EF-550D offers enhanced practicality as a multi-function chronograph to a level no mechanical watch can attain. Its appeal is further enhanced by a face design in the image of the engine cover to match up the requisites of Red Bull Racing. Additionally, the watch comprises of fast-moving retrograde dial at 6 oclock & a rotary dist. at 3 oclock to indicate the 24-hour to provide the timepieces an additional value. The appealing attributes of this watch gives fusion of strength merged with beauty to match up the wearer style.