It's a classic wristwatch indeed, the La Grande Classique de Longines, with reference starting L4.209 and a 24mm case that fits a 13mm strap. The quartz L209 movement drives it. Ref. L4.209.4.72.2 comes equipped with an alligator strap.
Shape
Round
Lug Distance
13.00 mm
Material
Stainless Steel
Glass
Sapphire
Diameter
24.00 mm
Water Resistance
30.00 m
Dial Color
Grey