An online source says:  “The Britannia and Suecia (both 4,661 grt, 376 ft. long) were both launched in 1929 and in service with Swedish Lloyd 1929-1966. They were bought by Hellenic Mediterranean Lines 
and renamed Cynthia and Isthmia. They were scrapped in 1973 and 1972 respectively.”  Now this unused card was issued by Swedish Lloyd, and clearly shows just one ship.  How much we would enjoy knowing the logic behind that.  In any case, Grade: 1