During the 1920s and 30s, Longines accumulated design experience while new movement shapes prompted a new generation of Longines watches featuring Art Deco geometry and trim rectangular or square cases. Such models were featured in 1928 in the first Longines advertisements, with “Elegance“ as its unique selling proposition. During that period, Longines launched three of its most memorably elegant watches, enhanced with diamonds and sapphires, which years later were reintroduced in a special limited vintage edition to celebrate 170 years of Longines elegance in watchmaking.