There is a drawing by Navarchos in the archive on this topic, but I hope nobody will mind a little update.
Early in 1914, Greece purchased two US battleships as a stopgap measure to bolster their fleet till the upcoming dreadnoughts became available. They were the last US pre-dreadnoughts and considered quite unsatisfactory. They were too slow to keep up with the US line, had indifferent protection by US standards and were overweight and poor seaboats. Nevertheless, they were sufficiently superior to Greece's three old coast defence ironclads to gain some popularity with the Greek Navy.
Neither played any significant role in the First World War, and never received any modernization worth mentioning, apart from longer-based rangefinders. Between the wars, they were downgraded to training ships. On an undated photograph, Kilkis is shown in a very dark gray of black paintjob with funnels and armament in a brighter shade. She could be told from her sister by the less built-up bridgework.
Both were sunk in 1941 by German bombers while in port; neither was battleworthy any more at that time, and Limnos was partly disarmed.