The Longines La Grande Classique L4.709.4.55.6 is a women's watch featuring a 33mm stainless steel case with a thickness of 4.5mm. It has a black dial adorned with 12 diamond hour markers totaling 0.081 carats. The watch is powered by the Swiss Quartz Caliber L420 movement and is water-resistant up to 30 meters. The bracelet is made of stainless steel and includes a folding clasp. The reference number for this model is L4.709.4.55.6.