
The date on the Aqua Terra 150M Annual Calendar only has to be changed once a
year on the first of March. The 43 mm case is made from 18 Ct white or red gold,
in a bicolour edition in 18 Ct red gold and steel, or in stainless steel. Again,
braclets in matching metals or leather straps are available for the Annual
Calendar models which are driven by OMEGA’s exclusive Co-Axial calibre
8601/8611.
The 41.5 mm watches are driven by the revolutionary OMEGA Co-Axial calibre
8500/8501 which has re-defined mechanical watchmaking for the 21st century. The
38.5 mm cases are equipped with a choice of the Co-Axial calibre 8500/8501 or
the OMEGA quartz calibre 1538.
>>Source : OMEGA
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