Instead of trying to reproduce the anarchic (and sometimes impractical) letters from actual watches, Decimal dissects the style into discrete themes, reassembling them in a different but more useful order. In the Breitling watch above, each model of letter G has its own merit: one is welcoming in its roundness, the other fierce in its geometry. Decimal applies these ideas in different places, so that they become less discordant, and more widely applicable throughout the typeface. In Decimal, open-armed roundness is evoked by curving the letter’s jaw, intensity by shearing its top stroke at a dramatic angle that ends in a sharp point. These decisions point the way to resolving the letter S (often awkward on watch dials), and the letter Q (generally absent.) More here.
A good idea that has been brilliantly implemented.