Postcard of Prince Oleg Constantinovich. He is facing right with his left hand raised to his head. He is wearing a jacket with a high collar. There is a caption in Russian below and a letter on the reverse. Prince Oleg Constantinovich was the fourth son of Grand Duke Constantine Constantinovich and Princess Elisabeth of Saxe-Altenburg. He served in the First World War with four of his brothers. This commemorative postcard was produced to raise funds for his mother's war work, but he was killed in action before it was issued.