1. Chopard Happy Diamonds
The first Happy Diamonds watch was created in 1976 for men and came with a cushion-shaped case and a black dial to highlight the moving diamonds. Later iterations were made with a round case, but when the model turned 40 last year, Chopard revisited its original case shape and matched it with a mother-of-pearl dial.
See also: Chopard Sparkles At The Hong Kong Tatler Ball 2017