Attica Group, Greece’s biggest passenger shipping company, has increased the size of its owned fleet with a pair of vintage sister ships.

The 30,000-gt Kissamos (built 1992) and Kydon (built 1990) were acquired for a combined price of €8.9m ($9.7m), the Athens-listed company said in a stock exchange filing.

Both were built at Mitsubishi Heavy Industries and had been employed with Attica on a bareboat charter with purchase options attached.