This innovation was made possible due to the introduction of a much-thinner film amorphous silicon or the absorbing movie layer for photo voltaic cells. Before the Eco-Drive calibre 7878, Citizen was producing solar watches with solar cells mounted directly on the dial, making the watches look cumbersome. With the invention of the Eco-Drive calibre 7878,… Continue reading Up To 49% Off On Citizen Avion Eco