Those C case chronographs are quietly becoming VERY popular around here. Between the Seamaster 861's, 321's and the Chronostops there are a lot of them.
The only reason I sold my 18ct 145.006 was it was too thick to fit under a shirt cuff as a dress watch and too much gold for a casual watch. Still got my ss 145.007 though - a bit thinner and a better day-off watch.