Yes K.Serkisoff & co were exclusive suppliers for the Turkish National Railways since 1880. The Ottoman Empire had signed an agreement with K.Serkisoff & Co in 1880. Since then when one gets retired from the railways it is a tradition to give the person a Serkisoff railway watch as a present. They stopped this tradition few years ago. This year Turkish National Railways celebrating their 150th anniversary. They ordered 1100 Serkisof watches for their staff.