
The Savoia was an Italian royal yacht of 5280 tons displacement launched in 1923 as the Citta di Palermo. The Savoia was powered by eight Yarrow oil-fired boilers providing a top speed of 22 knots and was armed with four 3-inch anti-aircraft guns.
Found on 
http://www.probertencyclopaedia.com/browse/RS.HTM
  No exact match found.