Longines Watch PrimaLuna Blue Ladies L8.115.4.91.6. While the Longines brand is known for designing timepieces suited to both men and women, the Longines PrimaLuna collection has made its name as a uniquely feminine collection since 2009. As the name suggests, its distinctive case finds inspiration in the poetry of the moon. Its diamond adorned dials, silver or mother of pearl, evoke the celestial body’s nocturnal shimmer. The models are driven by either a quartz or a self winding movement and come in a 3 hand version displaying the date or an indicator of... the moon phase.