Du Coq By Guerlain Eau De Cologne Spray (Tester) 3.4 Oz / 100 Ml For Men. This is a unisex fragrance that was created by Aime Guerlain from the design house of Guerlain and released in 1894. This is a timeless refreshing citrus scent for both men and women to wear. This fragrance has stood the test of time because it is simply an outstanding scent.