At the heart of the patented construction of a CENTURY watch lies the assembly, by means of a special chemical process, of its sapphire case-middle and sapphire glass into a henceforth inseparable unit called "megalith".

The hardest substance after diamond, CENTURY sapphire can be processed only with diamond-tipped tools. Cutting, polishing and fine polishing CENTURY sapphire is therefore no small challenge, demanding extreme patience and precision.