The original Omega Seamaster Aqua Terra was introduced in 2002 as a successor to the earlier Seamaster 120 - a more elegant, less sporty version of Omega's dive watches. It was available in a wide variety of configurations, with either quartz or mechanical movements.Ref. 2102.50.00 has a yellow gold case and matching bracelet. The dial is black.This model was also listed as being 41mm instead of the 42.2 shown here.