The Longines L8.115.4.61.6 Primaluna watch combines a 31mm round-shaped stainless steel case and silver stainless steel bracelet with a fold-over clasp. It has a green analogue dial with a date display at position three and a moon phase in the centre of the dial protected beneath scratch-resistant sapphire crystal glass, with serval layers of anti-reflective coating on both sides. Power is generated by the Swiss quartz movement. This model also has a water resistance of up to 30 metres.