The outermost ring is the conventional dial portion complete with applied markers, the Omega logo, and accompanying dial text. The two inner rings are used
link to set the alarm function. There's even a pusher on the side of the 41.5mm-wide case used to operate
link a quickset
link date. The crown is positioned at 4:30. The watch utilizes Omega's caliber 980 that allows the alarm to be set a precise minute (the competition such as the JLC only allows approximate time-setting capabilities).