This watch is also known as:
Q177244V , 177.24.4V(Q177244V) .
There are 24 different world time zones indicated around the dial. The crowns are equipped with an external butterfly collar that turns 1/2 turn clock-wise & counter clock-wise (independently of the crown), each collar has red & white enamel indicating arrows. White arrow indicates the crown is secure/water resistant, When the collar is in the secure position it compresses a gasket that ensures water resistance.18KT Rose Gold Case.